I live in Germany, if you have a specific question I can try to answer.
In general there are a lot of stereotypes about Germans, but most of them aren’t correct.
- Germans are efficient. Nope.
- Germans have no humour. Nope.
- Germans are unfriendly. Nope.
- Trains are on time. Nope.
Some are slow to warm up to strangers.
Many places only take cash still, though that is slowly getting better.
People do stare, not sure if that is specifically a German thing.
One thing that might be useful for you to know, coming from America. Many Germans get irritated by stereotypical American over sharing.
Be prepared to have your opinions on Trump probed.
And regarding experiences, most towns are older than America. Where I live they recently celebrated 800 years of age. There’s a lot of history to explore.
It would probably be better to get experience ideas from your daughter, since the area will be oozing with history and things to see.