I want to be an apprentice in cabinet design. I told my boss that I don't want my salary in January. Can I do that?

Yes, but first I think you should be mentally prepared. Cabinet design is not a good way out. First of all, you must learn well. You must go to the factory to see the production and assembly, then follow the installation, look at the drawings to understand the structure, and then place an order with the designer for CAD. It seems simple, but it is not. It depends on your economic base! Be prepared for three months without pay!