Colleges with ‘Aviation degrees’ in the USA are very expensive.
You need a Plan B for a different career path of aviation doesn’t work out for you for any one of many reasons.
Get your PPL in the USA, convert to EASA so you can continue building hours slowly while going to university in Germany.
Also join a segelflug verein as for later when you go for your FAA CPL you can use as much as 50 hrs of glider time.
Cone to the US for a month once a year and you’ll have your CPL Multi engine and Instructor ratings and a European degree.
Now go to the US for an entry level job that allows you to build to 1500 hrs to get to the airlines.