Any tips / links on how I can improve my Windows 10 Desktop?

titlte. So i can make it more 2009ish ?

maybe try classic shell

I do have a themepack I conjured up that makes Windows 10 look almost identical to Windows 7.
It’s for Windows 10 1709 though. it’s not really a good idea to downgrade to a version that’s quite a few years old now.