You might try watching a few welding videos to learn arc length, angle, travel speed, watching the puddle to ensure you are fusing/welding equally on both parts.
I'm primarily a stick weldor with a bit of TIG.
There's a lot going on depending if the welds you are making are flat, vertical, overhead, with different thicknesses of metal.
Instead of watching your friend Joe teach you the incorrect way, I would opt for taking some community college beginners class. Find out if they instruct in MIG since that's what you are using.
It's kinda like shooting. You aren't going to come out of the gate making perfect filet welds just like you won't be making those 100 yd shots with your Glock 23 with the first box or making one hole groups at 25. Take your time & learn the right way. It'll keep it interesting if you are successful with the first few projects.
Then, after a day or so, you'll be making Xray quality 6G welds & will be welding at a Nuke near you.