How do I get into a danish university?

I have dual citizenship in Denmark and the U.S. by naturalization until I am 22 and they evaluate me and decide to let me keep my danish citizenship or not, etc. I'd rlly love to start a life in Denmark by going to a university there. How do I apply and get accepted? Are danish universities selective about grades and extra curriculars? I kind of doubt my SAT and ACT scores and american high school grades will transfer over there. Any words of widsom? Any help is appreciated.