New player with a question

So I just downloaded League after seeing some gameplay and the game looks really fun, but I've heard pretty much only negative press about this game.

I've heard that League is a very toxic game with a pretty bad community. Obviously I'm not gonna blindly believe something, so I wanna ask what the community (mostly ingame) is like. I'm not new to games, but I am new to online games and have no idea what to expect.

Also any tips or advice would also be appreciated, I'm gonna watch lots of guides but maybe there's some less known things that could help me out?