Welcome to Linux! I’ve been using it since 1996 and doing design using FOSS tools for years. (At first, I needed to a separate computer for Adobe products for years, but switched full time to Linux a long time ago.)

A couple of quick suggestions of other apps to try:

• Krita, for image editing & painting https://krita.org/

• Penpot, for UI layouts (including website design), prototyping, and flow; a great replacement for Figma and Miro. https://penpot.app/

There’s a big list of FOSS design & photography software @ https://pixls.us/software/

And a huge list of alternatives @ https://codeberg.org/RayJW/awesome-foss#user-content-creativity (linked to creativity, but there’s tons more on that page)