Can someone help me undertand deeply how to win de endgame of rook vs queen ?

please i cant win stokfish in maximun level

www.chessable.com/course/6371/12/
I'm not advertizing anything. I guess even better studies may have been created on lichess already. This is where I learned this ending. I still haven't put it to practice in a real game though.

Even GMs fail. Kramnik once said that he wasn’t sure if he could succeed.

I guess I won’t win against a engine/tablebase.

PS: you mean winning Q vs. R!?

Q vs R is a very challenging endgame. The engine is going to defend it perfectly, so unless you know all of the relevant positions and how to force them, you're probably just going to go around in circles and ending up with the 50 move draw.

Here's a resource to get you started:
www.rolandbesblogs.com/queen-vs-rook.html

Queen vs rook is a win for the side with the queen. It is very difficult but it is like the double bishop mate endgame. If you have the idea of how to go about it, you can win