CLIM
Climate Global - Climate Resilient REIT Index ETF
stock NYSE ETF

first piece of advice and I know it's not one you want to hear: now is most likely not the time to start new long term investments. You are getting into the market at a really bad time near the peak of a tech bubble which means almost everything is going down across the board. Most of your best long term investment strategies will involve buying large managed mutual funds and the like which in a normal market mitigates risk by including a wide variety of equities, so as one sector goes down and another goes up, the price remains steady or goes up, and under those conditions normally more is going up and down so you gain slow and steady overall. Right now even some of the best mutual funds are going to be seeing declines as the market volatility is through the roof. The short version (from the perspective of a tech insider) is: tech companies are leveraging stock and IPOs to throw trillions of dollars at dead end generative AI with dog shit unit economics and investors are getting nervous as they're starting to realize they can't make it profitable. So, if you look at the market right now, look at the big picture and zoom out to see the last 20 years and take note of the shape of the chart. You'll see peaks at various past bubbles and one right now, and basically if you invest right now, then when the bubble pops, all that value is lost. Instead, I recommend waiting and keeping an eye on the market for when it happens (and it will happen soon, probably less than a year), and then start investing AFTER the price comes way down.
Trust me, it was hard for me too as I finally had the money this year to really start expanding my portfolio, but the more I looked into it the more clear it was that I got in at the worst possible time.
$850 is not a lot of money, and certainly not enough to build a good well balanced portfolio. Most of the best performing mutual funds have minimum buy in amounts starting at a few thousand dollars and up to a few hundred thousand. Since you don't want to just sit on the money, I recommend instead finding a good fixed rate savings CD or money market cash account which will return a few percent every year rather than a few fractions of a percent, and keeping it in there while you wait for the buy in opportunity to present itself.
Alternatively, you can gamble it all away very quickly trying to time the market buying stocks and ETFs right now without a ton of experience and money to lose while you learn... I recommend the slow approach. Watch and wait and learn in the meantime, and when the time is right, be ready.
P.S. If you're dead set on ETFs, there's an REIT called *Climate Resilient US REIT Index ETF (CLIM)* which carries some risk on account of being new, but their investment strategy targeting specifically climate resistant land and real-estate is probably the most recession-resistant of the available options as it will continue to grow in value ever more rapidly as the market and conditions deteriorate. The price is cheap right now around $26 a share and steadily growing.
P.P.S. in answer to your final question, check out investopedia.com and their youtube channel at https://www.youtube.com/c/investopedia for some really good starting primers on investments and trading.

first piece of advice and I know it's not one you want to hear: now is most likely not the time to start new long term investments. You are getting into the market at a really bad time near the peak of a tech bubble which means almost everything is going down across the board. Most of your best long term investment strategies will involve buying large managed mutual funds and the like which in a normal market mitigates risk by including a wide variety of equities, so as one sector goes down and another goes up, the price remains steady or goes up, and under those conditions normally more is going up and down so you gain slow and steady overall. Right now even some of the best mutual funds are going to be seeing declines as the market volatility is through the roof. The short version (from the perspective of a tech insider) is: tech companies are leveraging stock and IPOs to throw trillions of dollars at dead end generative AI with dog shit unit economics and investors are getting nervous as they're starting to realize they can't make it profitable. So, if you look at the market right now, look at the big picture and zoom out to see the last 20 years and take note of the shape of the chart. You'll see peaks at various past bubbles and one right now, and basically if you invest right now, then when the bubble pops, all that value is lost. Instead, I recommend waiting and keeping an eye on the market for when it happens (and it will happen soon, probably less than a year), and then start investing AFTER the price comes way down.
Trust me, it was hard for me too as I finally had the money this year to really start expanding my portfolio, but the more I looked into it the more clear it was that I got in at the worst possible time.
$850 is not a lot of money, and certainly not enough to build a good well balanced portfolio. Most of the best performing mutual funds have minimum buy in amounts starting at a few thousand dollars and up to a few hundred thousand. Since you don't want to just sit on the money, I recommend instead finding a good fixed rate savings CD or money market cash account which will return a few percent every year rather than a few fractions of a percent, and keeping it in there while you wait for the buy in opportunity to present itself.
Alternatively, you can gamble it all away very quickly trying to time the market buying stocks and ETFs right now without a ton of experience and money to lose while you learn... I recommend the slow approach. Watch and wait and learn in the meantime, and when the time is right, be ready.
P.S. If you're dead set on ETFs, there's an REIT called *Climate Resilient US REIT Index ETF (CLIM)* which carries some risk on account of being new, but their investment strategy targeting specifically climate resistant land and real-estate is probably the most recession-resistant of the available options as it will continue to grow in value ever more rapidly as the market and conditions deteriorate. The price is cheap right now around $26 a share and steadily growing.
P.P.S. in answer to your final question, check out investopedia.com and their youtube channel at https://www.youtube.com/c/investopedia for some really good starting primers on investments and trading.