HeloOoOo~ Firt of all...
HAPPY BIRTHDAY!! ^^
I would just tell you to follow your own rhythm, don't get overwhelmed of the amount of "adult things" you think you should know, you will figure it out, nobody really knows how to dwell with these kind of things at first. Just take your time, and not just for adult things, also for your own personal goals or relationship ones... literally for everything!
I really wish you the best! ^^
its hasn’t been long since i turned that age too but one thing i learned is do not listen to anyone. listening to their advice is ok, its good even. but doing or choosing something just because they told you to do so, it's a big no no. do not do it. if you do not know what to do or what to choose, that's fine! go with your guts, make mistakes, go a little wild. if you want something and someone, like your parents, is against it, fight for it. you can disappoint your parents early on and they will learn to accept it, but i think that is a lot better than being miserable your entire life because you hate the path that you took. aside from that, good luck!!!

Hi guys so I turn 20 in October, and I’m 19 now and a female. So can yall like gimme so life advice I wanna see what I’m in for? Like stuff u wish u got told to prepare for ur 20s pretty pls (⊙…⊙ )