Student Work Visa?

Hello to all!

Thanks first and foremost for anyone that has any information to contribute to my question, it is greatly appreciated!

I am now living in Germany, staying with my uncle. I am planning to attend a Hartnackschule to learn the language. Will attending this school allow me to apply for a work visa (even part-time)?

If not, what language school would permit me to work legally within Germany?

Also, what is the procedure that is required once I've enrolled in school to get myself working papers?

Any information / links / other form posts that detail the answer(s) to my questions will be greatly appreciated!

Danke!