Hi, welcome to RPoL.
Soooo, if you're looking for a game, you can check in "Wanted - Players". GMs go there to list the games they have with spots for players. I would suggest looking for games that mention being newbie friendly. Maybe try one that is free form, which generally are very light on rules and are more about character interactions and roleplay.
If you can't find one to your liking, try looking in "Wanted - GMs". You can post there asking if a GM would run a game for you, and be sure to note that you are new. You might want to also offer up what sort of genre you want to play in. Fantasy, sci-fi, western, etc.
There is also a forum called "Game Proposals, Input, and Advice". That's a place that's generally used by GMs as a sounding board, to see if there are people interested in their game concepts. You might be able to get in on the ground floor to something cool. Worth looking into.
You can also ask all your beginner questions here.
I would also suggest checking the Discord server:
/chat.cgi
There are usually folks awake in there, who might be able to answer questions you have in real time. :)
Enjoy your time here! :)