Not too sound ignant but how do I buy stocks? Idk a damn thing bout stocks, Roth IRA, etc
I didn't know these things either when I was your age. My parents didn't know anything about that. It's good to ask questions.
The Robinhood app is a kinda risky to use so I'd avoid them since they've had more major problems then other brokerages such as being hacked and people losing their money and thier systems crashing when there's a big market crash. Both of those things happened this year.
I like to use tdameritrade. They're the best brokerage that I've used so far (I've used Schwab, Robinhood, Scottrade, and of tdameritrade).
Since you are young and just getting into this I think you'd be better off just opening up an M1 account and setting up a FAANG pie and doing fractional shares in that. You won't have to be as active going that route. You can just throw money in there and let it sit. (FAANG = facebook, Amazon, apple, netflix, google). Maybe you could throw Tesla in that pie too.