Most of the Germans you meet will have English better than your English.
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Just to back up what Manic is saying - I've lived in Germany three times in total, the first time in the south, second and third times in the west near the Dutch border.
The south is by far and away the prettiest area. If you started somewhere like Baden Baden, go south through the Black Forest, into Switzerland, head east into Austria, then loop back north into southern Germany, you'd see the best of the scenery and is doable in 2 weeks. The whole area is stunning, lots of mountainous areas with little lakes everywhere, pretty little villages and seemingly a Schloss on every peak.
I found Hohenschwangau a bit boring, especially for the entry price. Neuschwannstein however was well and truely worth it.
I went in the middle of winter, the scenery was amazing, but the German wood-piles even more so. The forest everwhere was littered with perfect stacks of wood all of graded size and cut to matching length and neatly stacked for drying.
The Bavarians take their winter preparation seriously. The ones that didn't froze to death centuries ago.
No problem Martin.
Let us know when you've got your start point organised, and I'll see if I can pass on any other places to visit.
After writing my post above, I went on a trip down memory lane. I went looking for pictures of my times over there, and found an old one of my school
https://www.aulro.com/afvb/images/im...013/06/979.jpg
This was taken about 40 years before I got there though! Part of it was a monastery that dated to the early 17th century, and was our Maths block.