I have had to self educate since day one of my first real job. I was lowered into a concrete pit 20 feet below ground and asked If I knew how to weld. I said no. The person running the forklift looked at his watch and said "You have 7 hrs to figure it out" Then lowered in a length of 12" diameter tubing that was at least 1/4'' thick. It had to be welded to the face of the pit, which was steel to facilitate an offset pole impact. The welder had already been placed in there prior to my arrival. A few hours later I climbed a ladder back up to civilization having successfully accomplished my task. The test ran later that week, with a instrumented vehicle filled with two Anthropomorphic Testing Devices (Dummies) slamming headlong into said large piece of tubing. The welds held. I learned something and kept my first real job.