The Internet provides useful information for the accommodation hunt. Examples for search engines for shared accommodation or individual flats in Germany (if not stated otherwise, websites are available in German only):
In addition, the Studentenwerk Würzburg offers accommodation in student residences:
How to get accommodation in a student residence is explained on the pages of the Studentenwerk: https://www.studentenwerk-wuerzburg.de/wohnen/der-weg-ins-wohnheim.html
There is also a boarding school in Gemünden am Main that offers accommodation to international students.
If you are interested, please contact Marco Ruck: m.ruck[at]kreuzschwestern.de