There are several "variant" tournaments you can join under thematic correspondence tournaments. There is 5N+Q vs 5B+2R, 7 rooks vs Normal setup, and others. These are for study/fun/practice and they are unrated.
Could you help us find them by posting a link?
https://www.chess.com/tournament/5n-q-vs-5b-2r-imbalance
https://www.chess.com/tournament/7-rooks-vs-normal-setup
https://www.chess.com/tournament/proximity-chess-variant
https://www.chess.com/tournament/material-imbalance
There are several "variant" tournaments you can join under thematic correspondence tournaments. There is 5N+Q vs 5B+2R, 7 rooks vs Normal setup, and others. These are for study/fun/practice and they are unrated.