Just keep in mind that you will not be receiving speedy security updates, and in some cases you will need to wait for quite a while before packages you have will be updated (weeks, maybe longer).
If you want a proper rolling release distro that is not Arch/Gentoo/Void/Nix/GuixSD, you could go for openSUSE, which provides a rolling release distro with a system rollback feature by default. Nice, easy to use GUIs for whatever you need. Although openSUSE also is sometimes a bit slow with the security updates for some packages, it’s nowhere near as slow as Debian testing.