To reiterate what Dietz199 said - German students often have had 13 years of school under their belts before heading to University and they go directly into their majors. So you better be really sure you know what you want to major in first as you won’t get much opportunity to sample other subjects. German kids are encouraged to figure out their career paths early in high school, if not sooner and switching majors is less common than here. Some majors, such as art, film etc may require studying at a Fachochschule rather than a university. These are more like technical colleges.
We figured out that the scholarship my daughter was getting at her US university made it roughly the same cost to go to school in the US as in Germany, where she’d have to pay for room and board as an extra plus flying home periodically.