Most tweaks on protondb are either copy pasting a few options to a Steam dialog box, or picking a particular option in the compatibility list on the GUI. Mostly old games take a bit more effort, yet it won’t be any harder than what you used to do to make mods run on Windows. Really, the only reason anything Linux could be intimidating is because it is unfamiliar. As soon as you start seeing the parallels with tinkering and tweaking on windows, you’ll realize that it is actually easier, more intuitive, and more stable than on Windows.