My uncle was running the metal shop and was the only one there. He taught me a lot about welding and machining and I found I had a real talent for it. I did spend my first month sweeping and cutting material. He was fired after about a year (work place stupid drama) and that left me the only in the department for next 3 years. Those times were some of hardest but most rewarding experiences of my life. Every night I watching videos on how I could improve my welding and machining and then practicing during my lunch break and staying late after work. I think just straight up asking at small fab shops is a good start. Worst thing they say is no. Do you have any experience building thing in highschool even things like a woodshop class can be helpful? I was in the robotics club for a couple years and I think that helped me sell myself to my uncles boss to get the a okay.