More and more people just need to switch to Linux and grow the userbase so more and more proprietary software create Linux builds just like how Maya and Davinci Resolve are available for Linux. If your computer is a web browser, you should be on Linux. Firefox, Chrome, Edge are all on Linux
If you’re a casual photo editor, Darktable. A casual photo editor can probably be well served with GIMP or Krita. If you’re a web browser and digital painter Krita. If you edit videos, Davinci Resolve and Kdenlive. Office - OnlyOffice, Libre office, WPS Office
I think 128GB should be the minimum. A lot reserved for the operating system and the rest for storage hungry applications. At least save local map data and some music