Ok I get it now, you like to make jewelry. You're looking for a job in a jewelry shop or want to set up at home. Let's take those one at a time.
In a shop - There may be some shops here that will hire an English-only speaking person, but I am not sure. Most of the jewelry makers here will have been to a technical school/appenticeship and earned a diploma in the field. Do you have such a diploma? Is it equivalent to the Swiss one? Something to consider.
At home - Most apartments and homes for rent have strict rules about whether or not you can run a business from home. This would be even more strict if you plan on doing castings, etc. I imagine you could source metal from the same sources you do now, but with import restrictions and the like. I am also sure there will be strict laws about how you work with it and dispose of your tailings.
Best option is to investigate working for a jeweler here, and to work on those German skills to improve your odds of landing a job. Keep us posted on how it works out.