Re: Welding. Not as easy as it looks......
I originally learned on an arc (stick) welder. I went through quite a few molten sticks before figuring out the art of "amp choice vs metal thickness". After that, you have the hurdle of rod movement speed and "mounds of metal vs gaping holes in your bead". Lastly, you begin to realize "this welding thing is seriously fun!"... until you try to weld thin metal.
Years later (last year to be exact) I bought a flux-core (mig) welder in order to weld my broken thermostat housing back together. I began practicing using a piece of exhaust pipe from a local shop. I would cut it in half, weld it back together, cut it again, ad nauseum. That learning curve consisted of a smaller, yet still present "amp choice vs metal thickness". Then came the dreaded "wire speed vs confidence", which meant me having to trim the out-of-nowhere excess 6 inches of wire on a regular basis. Then came the "beads of metal everywhere vs molten goo ruining more than I'm fixing" speed issue again. After those steps were completed, I began to see welds which (if you did some LSD and squinted really hard) slightly resembled real welding beads which were grindable to a clean, level surface. Sure enough, I did manage to fix my thermostat housing, even with two pieces broken off. I did, however, buy a new housing as I didn't want to risk actually relying on my first ever welding job.
So, in short, yep, welding is a tough learn. I've practiced quite a bit with stick, fixing mower decks, snowblower cages and many other small items and still consider myself a total newbie. As for mig welding (flux core, no gas), I consider that a means to sell grinders, but it is a cheap way to get started and some even work on 110v.
Oh, and without a doubt, buy an auto-dimming helmet. It is a night and day difference, pun intended.