In fact, even if you quit your job as a jewelry designer and choose an illustrator, you will regret it.
Today's illustrators and even original paintings, except for popular illustrators and original painters of games and movies, most painters can't escape the work style of "piecing together elements" and "copying for reference".
It's not that they are not creative. They may have it, but they may have used it up. They may have it, but they may be asked to "copy".
So the nature of the job may be no different from your current job. If you like to draw some cartoon illustrations, you might as well find a relatively easy job to do. You can draw whatever you want in the rest of the time, and you can also run a social platform to distribute your works. Maybe you can get rid of boring work when you become famous.