What do yall suggest?

Im planning on going into the air force but want to have some backup plans just in case something happens to plan A

I like working with my hands, dont mind hard work, wouldn't be against moving to another state depending on the specific one, i dont want something so niche I cant find a job, want solid pay but I dont need to be scroogr mcduck or anything crazy, looks good for a long term career, etc

Im considering electrical, HVAC, plumbing/pipefitting, and Airframe & Powerplant but open to suggestions