Können auch Fahranfänger „platzsparend“ parken, oder muss man dafür erfahren sein? Oder lernt man das in der Fahrschule, also das Gefühl oder so?

Can also park starters “space-saving”

Yes, if they learned how to park.

Or learn this in the driving school

Jein. You learn how to do this with the Driving school car do.

So the feeling or something?

This depends on the vehicle driven in each case, so you cannot generally learn how to park with a specific vehicle ideally.

or do you have to know?

Experience definitely makes it easier to park faster/leaved space-saving. But with a correspondingly much “in and out” it also creates a beginner.