Hi Kate, As far as I know there is not much available
about being a designer. You can train to be a designer. There are
courses for people who want to be jewellers. That does take time.
You could work with someone who would teach you about designing. I
trained as a jeweller/silversmith for about 5 years. I also took a
course in Industrial design which helped a lot. Can you draw? Do you
do your own designs? Do you work with metal? What medium do you want
to use to make jewellery? If you answer some of these questions
perhaps I can help you to find the next steps you need to take.