As many others have probably said, the game is fun but the community is toxic. As a new player I would suggest playing on mute all, but to be honest, it's riot fault for even letting it come this far.
People will flame or blame you if you play bad or make one small mistake, it's just such an hassle. They can also grieve your game by intentionally feeding or afk in base. And the worst part is those people won't get banned. No. The only people who do get auto banned are the ones who are saying racial slurs or anything deranged like that.
So, yes it's a fun game but the community can and will be very toxic if they seem you to he a bad player.