Yes, that is generally true. Please note that you have even better standing in the UK, there Americans are allowed to stay 6 months. Right now there is an entry ban for Americans to the EU but not to the UK
Sure I traveled a lot in Germany as well.
- Public transport in the towns is not so bad, but trains between cities are crazy. For any travel around I would go with bus or hitchhike , even blablacar is a good choice.
- For food you might have a chance to get it for free, they have a big...