Unfortunately, OGS is not a good place for beginners to start playing against humans, because for the first couple of games you will get opponents who are way way way stronger than you are.
I even suggest to deliberately lose at least fifteen games but do it in a way so that nobody suspects you of losing deliberately. Easiest way to do this is to play random moves (not too close to the edge of the board), playing them very fast, until your position is obviously hopeless, and only then resign.
After having lost fifteen to twenty games, the server will start pairing you against other beginners at least in some of your games.
That’s the only way I’m aware of to minimize the “mandatory frustration period” for beginners on OGS.
You might also want to check out the thread below on that topic: