In the somewhat distant future you’re looking to switch to Linux. Okay, the question of distros can wait.

What you want to do in the not-too-distant-future if possible is start finding FOSS alternatives to the software you use. Stuff like LibreOffice and Krita have Windows versions, so in the meantime start learning and using those apps. Because that’s the real pain point.

As for distro…distros don’t really matter. Most of the user experience comes from the desktop environment, and that’s a matter of preference so personal that the real answer is “try several and use the one you like.”