Proton is very Linux friendly, i main on Linux for a few decades now and had about 3-4 games not work. So i wouldn't worry about that, however lightroom (and i assume the rest of adobe suit) is out. Couldn't find a way to install it sensibly at all. Which is unfortunate. The backup for this for me was to use an old android tablet and sometimes id use the work mac out of hours to do some post-processing.
But the rest doesn't matter much, i personally like Manjaro but the distro doesn't really matter.