Don’t do welding, or pipe fitting. Speaking from the counsel of family whose profession was this (and they were one of the best, truly). In their own words they’d never advise anyone to go into that these days.

To do things over, as much as they loved it, they said they’d probably join the sparkies. Electrician or lineman.

Meanwhile hvac trade is a wash with really terrible people, the most conservative trade, low union, and highly variable in competency.

It’s not, “No (such thing as) stupid questions”; it’s “no stupid questions!”

/s