This applies to many niche skills. I didn’t learn astrophotography from school, I learned it by getting my hands dirty & spent every night learning how NOT to do it.
If you want to do something, just start doing it. Waiting for someone to teach you might leave you with nothing.
There is obviously no “degree” you can get from a university that actually teaches you how to make an orbital rocket, as none of the professors know how to do it!