I’m pretty good at making things. I can weld reasonably well, mig, torch, and forge. Decent at wiring things up and soldering. Fabrication? Do you want wood, metal, plastic?
I’m also pretty damn sure that I, under no circumstances, should be building personal aircraft…
Related story, once a friend tried to enlist my help building an ultralite. My response: “I have absolutely no idea how to build a plane. You definitely do not want me responsible for something that your life depends on.”.