How to begin making my own ISP?

[hasserw]

I want to begin making my own ISP, mainly for high speed servers 
and such, but also branching out to residential customers. I'm 
going to be in Germany for the next school year (probably either 
Frankfurt am Main or Berlin); any suggestions on what sort of 
classes I can take there that will be in English and will teach me 
all I need to know on how to build and manage my own ISP, AS, etc? 
Thanks.