Will i have difficulties as a german getting a work permit?
No, as an EU/EEA or Swiss citizen you are normally entitled to get a work permit. In fact, work permit wise, you can start immedietly without any formalities and work up to 3 months before you need a work permit.
Most Swedes know English pretty well, although Germans seem to pick up Swedish pretty fast. I know that for Norrlandsflyg's SAR contract all crew need to be able to communicate with Swedes in their native language.