Stuck at 600 ELO
Just keep playing, and you will get better😉
I may not be a GM or 1500 or anything like that but I know in terms of improving in any game getting better at it doesn't involve mindlessly playing game after game. If you want to get better at most games you review your own games and mistakes and learn how to fix them! (or if you lack the experience, have someone else review them or pay for the subscription)
Just keep playing, and you will get better😉