[Rotary Evolution]

mig/gas is by far the easiest to learn to weld on because it won't splatter and units are cheap enough these days to pick one up for relatively cheap.

oxy/acetylene(basic torch welding) is probably the most difficult to get a grasp of because you are focusing on flame temperatures to melt the base material but just not hot enough to blow it out.

arc welding is the second easiest method to learn but it is also the dirtiest method with lots of splatter which takes some time to control.

TIG is probably one of the most difficult methods because there are so many variables like tungsten materials and diameters, torch cup sizes for gas direction, angle, filler feed style, using both hands to weld with(similar to oxy/acetylene), gas flow rate, heat ranges cycling, yadda yadda. but TIG welds are the best looking welds by far.

i have oxy/acetylene, a dedicated arc welder, mig/gas and a miller econotig. i used the mig machine for years(bought it new about 15 years ago and still works great) which is an old astro power 130A 110V unit and it did everything i needed with the exception of non-porous aluminum welding(mig welding cannot clean the base material so there will always be foreign material that will create 'pinholes' in aluminum welds, you could theoretically get decent aluminum welds with a mig but it requires a perfect environment which is nearly impossible to achieve).

everyone will pick up a certain type of welding quicker and easier than others but it is simply not cost effective to find your niche unless you had access to a welding class to try each type for yourself.

right now i'm learning on the TIG with aluminum and it is the most difficult process to get right, but this machine isn't the best for a novice since the pedal only has a working range of 55-166amps.