you’re overcomplicating it. get a separate $20 SSD and install the OS to it, dicking around with wine and tools within virtualbox is a headache you don’t need. set it up as desired (I recommend using flatpak versions of lutris and friends because of freshness) and then install the games one by one, followed by transferring the game data/settings/etc. you can experiment to your heart’s desire because you always have the fallback solution of your original drive.
then, when you know what’s what and where’s what you can make the transition. good luck!
correct, no idea how I managed to do that.