Proofreading/Editing a German book, Formatting kindle create and Spice up the book + Design the cover

I have a book in German language(Germany). The book has about 113 pages/50000 words. I need help to editing/correction, Formatting kindle create and Spice up the book. I would needed help to Design the cover of the book
I need the job to be done within 20th March. And my estimate budget is 420$

Note: Only native German speaker would be selected.