Probably just throw it in the bank / Invest it.
I know not the most exciting answer but there you are.
Pay a bunch of tax on it then wonder what to do with my extra 580€ a month
Support open source projects, such as Wine, KDE, Wayland, LibreOffice etc.
Maybe leave the parents house and begin a life in an apartament, at 40 years old.
It's so interesting to me how money can have such a different value for different people. I live in the EU yet I make less than 1000€ a month even though prices are at EU levels. This would more than double my income and it would mean I could finally afford new clothes, I wouldn't have to worry about having money for food, bills would be paid on time and I could even save up a meaningful ammount! It would be a literal life-saver.
Pay off my shit and actually feel financially comfortable for once
Buy a newer car and increase my 401k contribution. Maybe I could retire a couple of years earlier than I plan to.
Fix my teeth and go to med school. In that order
Privat med school in Germany costs a bit over 12k a year depending so I'd just work and save for a year or two first, then enroll
NFTs, cheap gin and scratchers.
Real answer: pay off my car as fast as possible and throw the rest in savings