Hello Germany and auf wiedersehen high tuition and loans

I have a burning question that I was going to take up with the semester abroad department once my D enrolls in college but you all seem very knowledgeable about schools in Germany perhaps you can help? D hopes to study meteorology at OU, they have semester abroad program at the University of Hamburg
here the info about the program:
http://som.ou.edu/content/pdf/exchHamburg.pdf

D also would like to do a music minor. Do you think it would be possible for her to take an “applied lesson” class or “ensemble” class at the Hochschule für Musik und Theater Hamburg while she is at the University of Hamburg? D asked about the music department chair about this and she said she would approve credit.

How difficult is it to take one or two classes at the Hochschule für Musik und Theater Hamburg? She already meets the minimum German language requirement but I do not speak German and I couldn’t find anything on their web site about non-degree seeking students. I think she will have the time and the schools appear to be fairly close at least on the map.

Even if she can’t get credit, I just can’t see her not playing her instrument for 6 months!