M,
Generally the level of education in the United States is not as high as it is in Europe.
US airlines will gladly accept European degrees.
May I suggest you look into modulair training?
This means you don’t do everything at once but in steps.
Come to the US for a month and do your Private pilot license. Maybe the next year your Instrument rating and the next year your Commercial and Flight Instructor Ratings?
That would take you into your early 20’s and ready for entry level jobs while completing higher education in Germany.