This is tricky, but navigable.
The job you're looking for doesn't exist until you make the connection with the person who might train you. It's expensive, and time consuming, but you've got to hit a few shops and maker's spaces and let them know what you are looking for, and ask them if they know anyone who needs help in exchange for training.
Compensation from you to them will be more attractive, but I'd start there and see if starting to get paid for your time is something you can test into once you've proven some usefulness.