I'm improving in Rapid , any tips?


1st is that Too many people focus on the rating and when they focus on the rating they play much worse.
2nd is the mental part like removing distractions, your opponent’s elo so put it on focus mode so that you can’t see your opponent’s elo, and after every blunder you should try to forget the blunder and keep playing or rest.
3rd is too identify your weaknesses and try to improve at them like if you keep blundering then find a way to fix that and that goes for every other part of chess. Wile you review a game here are questions to ask. Did I make a mistake in the opening? What mistake did I or the opponent make, and what did I miss? things you might have missed are free pieces, tactics, and weaknesses. For super new players you should first check the meanings of chess terms and learn basic principles in the opening and then learn how to make a plan and blunder check your moves and your opponent’s to see blunders from both sides. Search up practical and theoretical endgames to learn them.

I believe there's an option in the settings that hides your opponent's username and rating until after the game has started, preventing potential "anxiety" when playing against people who are a lot better (or worse) than you are.
GothamChess uses this sometimes, and with it he had a quite spectacular moment he captured live: after a particularly rough game he managed to win, he opened the game review to see who he had just beaten. Much to his surprise, the opponent was none other than Hans Niemann.
The reason for this is simple: it's a lot easier to do almost impossible things when you don't actually realize they're almost impossible, while knowing something is easy (or rather, should be easy) can actually make you worse at it. Hans knows he's better than Levy and should be able to beat him without any trouble, which led to him playing a lot worse than he usually does. Levy, on the other hand, played just fine because he had no idea who he was up against.