On Linux, you have GIMP (for photo editing and digital painting), Inkscape (for vector drawing), Krita (for digital painting). These apps are not meant to emulate all the features of similar Adobe apps. You will have to learn new apps on Linux with no connection between them. The resources for learning these apps are small compared to the colossal number of learning resources and tips for Adobe apps. And don’t forget the massive number of brushes, actions, scripts, filters, LUTs etc.
If you decide to stay on Windows, you have the Affinity apps as possible options: Designer (Vector), Photo (Raster), and Publisher (DTP). These are professional-grade apps and have excellent integration with each other. However, the Affinity apps do not try to match Adobe apps feature-for-feature (intentionally so). That means you may find some Adobe features missing in the Affinity suite of apps. Also, expect different ways of completing tasks and different shortcuts (sometimes).