If you are able to get into a remote work position that would be ideal. That would let you travel around to the different options you have and live for a while in every place to get a feel for it. Europe is not monolithic, so it would be good to experience the different options and see what you feel best with.

ask this question in r/GermanCitizenship

Buddy, have you heard of the word “a”? Sure doesn’t look like it from your post haha.

Hope you get it sorted out and it works out without too much pain

Lots of tips here, so i’ll just say have fun and good luck on the move. Treat it as an adventure! Despite what people online would like you to believe, America is awesome

(Before you downvote me for being positive, i’m not American)