Mac user since 1984 (also a lot of *nix experience). Switched to Fedora as my daily driver last year. Started with Gnome but got frustrated that every personal preference I tried to invoke required yet another extension. Switched to KDE and have been quite satisfied.

Not sure what you’re looking for, but you might start with some of the references in this blog post:

https://pluralistic.net/2024/10/21/we-can-have-nice-things/