First of all, if you just graduated, you can go to a large jewelry company as an intern and be a designer. Of course, during this time, your goal is to hone your craft, and making money is still a trivial matter.
If you feel that a big company is too complicated and uncomfortable to work, you can also work in a private studio, which is usually in personal tailor, which will exercise your design ability.
When you hone for a period of time, you have the ability and savings. If you are ambitious and smart enough, you will try to run your own jewelry store, whether online or offline, there will be good development!