Back when I had a surface pro I used GNOME with a plugin that gave a floating dock that could be shown by pressing a semi-transparent button. That made it a lot easier to use without a keyboard. For applications I mostly used the default GNOME ones. They are often pretty easy to navigate with just a touchscreen.
Also, if you want to use the stylus to take notes or edit pdfs I recommend Xournal++. Krita is of course also great for drawing and has great stylus support.
Isn't that one of the colors Bob Ross was always using?