Previous posters have touched on all the specs and such so I will skip that.
I have Miller machines. The son in law was ready for his first mig and asked many of the same question as the OP.
He thought he wanted a 110 capable machine until I showed him what he was currently working on versus what the capacity of the machine was. Also explained that a baby machine will eventually cause buyer remorse when he needs to weld something with decent thickness and that day will certainly come.
Miller was out of the budget so we went chinese shopping.
After much looking and YT college we meaning he settled on an Everlast dual voltage machine.
He settled on this one.
Cyclone 212 | Everlast Generators
Things he learned along the journey.
1: Anything takes practice to get quality welds including MIG. Color me shocked..not.
He is a couple of hours away so the only beginning advice I gave him was to listen to the buzz versus what he was laying down.
2: Straight wire with gas is great, especially indoors. Outdoors with wind the fluxcore wins. Machine will do both.
3: The more you weld the more you find that you need the strongest machine you can afford.
4: Machine also does stick which there will come a day that he finds that useful.
5: Machine will actually do aluminum with a bit of trickery. He is experimenting with it. No feedback yet.
For what it is worth the above YT channel has a lot of basic how to vids that seem legit.
Other:
Eyesight.
As we get older this becomes an issue. What I learned after becoming frustrated and wondering where my talent went.
1: The clip in magnifiers don't work, at least for me. Some various readers from walmart work better.
2: Seriously, Get your eyes checked.
Seeing flares around lights at night? Yup. In my case it was cataracts which everyone gets to some extent or another. In my case the left eye was getting to the point it was like looking through gauze. That causes major, major depth perception issues.
Had both eyes done. Piece of cake by the way. You will need dark sunglasses for a while.
Like night and day difference. Halleluiah. They claimed I had 20/20 again. I told them that was a maybe.
I felt like I might have my 30 yr old eyes back which was great but it certainly wasn't my 20 year old eyes.
Either way I didn't need readers for several years. It's that time again so I will get them checked again. May actually break down and get some prescription glasses. Will see it that lazik thing is a possiblity.