I just started and I don't understand anything

I saw Sylveon, and she's cute. So since it's a Pokemon game, I figured why not? HAHAHAHAHA

But seriously, I'm trying to explore other games other than wildrift and MLBB when I saw this. All I do is spam press everything without understanding it lol, my only goal is kill everything I can kill and shoot whenever I can.

Any tips on how I can start learning how the game actually goes? Like where do I start, or is there any streamer I could follow who teaches the gameplay?