Gaming through Steam/Proton is easy and performant, but some games have invasive anti-cheat that won’t work on Linux, and some game companies turn Linux support purposely off.

Photoshop and Lightroom both probably work through Wine (or maybe even Proton), but it isn’t guaranteed. Best option is to work with alternatives. I switched from PS to Krita years ago and have been happier than ever with the switch.

There are many resources on Linux software that are alternatives (and often compatible with) windows-only software.