I took 3 semesters of welding in college, but I’ve been a mechanic (both HD trucks/equipment and auto), an equipment operator, a machinist, and only got a job welding about 6 months ago
Submerged arc so I’m not stacking dimes like a pimp, but I stick things together with full penetration
I used a Miller Trailblazer and Lincoln LN-25 wire feeder when I ran a service truck, no complaints with either one. At work now we have a mix of blue and red, failures are about equal between brands, usually due to lack of maintenance
For home use I have a 220 stick welder (basic Lincoln buzz box) a dual voltage stick welder (HF Titanium) and just bought a 110 flux core MIG to try out.
Lincoln “buzz box”: great for shop/garage use, but not portable, and stick welding isn’t the easiest to start learning on
HF Titanium Stick 225: good for mobile use, lightweight, likes the Hobart 7018AC rods. Haven’t tried it on 110, only 220 off my generator
HF Titanium Easy Flux 125: only welded exhaust with it a couple times using .030 wire, looking forward to using it more on projects 1/4” and under
My advice is take a class at a community college or buy a flux core mig and auto darkening hood and start experimenting