Apologies as not quite TEA but close, sort of like an ac dc current limited variable ~80V 200A power supply, my new TIG welder.
So many settings to get right, current, ac balance, frequency, electrode/cup size, gas flow-pre-during-post , and if you touch the filler rod to the tungsten - then you have to take it out and grind it again. (actually put in one of the other 9 you ground earlier!) My first butt joint after about 10 trial runs - not pretty but I am getting better (not saying much)
I think I am going to have to do it seated - I wobble too much standing.
Two things... One, DON'T learn while sitting, and keep running the torch without the foot-pedal until you're reasonably proficient. Seated and pedal is for production work under ideal conditions; you want to learn your technique (especially coordinating the torch motion and the stirring of the filler) under real world conditions so you'll always feel confident when you need to weld a part onto something you can't move to an ideal position.
Trust me... you'll be a much better welder much faster learning this way.
Also, when prepping the work, remember to vee your joints deeper & wider with tig; you don't get the penetration you do with ferrous metals and stick, so the extra room for the stirring action will help you greatly.
Good luck!
mnem
"Let's light this candle...!"