We have a variety of machines at work, from digital with every bell and whistle to plain Lincoln Idealarc. Probably 75% of all the welding that gets done is TIG.
Our guys that do the welding can make excellent welds with either setup. We have several small portable 110 Tig setups with dry heads that get a great deal of use out on factory floors and in areas with limited space. I've seen welds our guys have made with scratch arc that you would swear were made by a machine.
I'm not a welder by trade but I have a dry setup that I use at home on my Lincoln DC tombstone. It works quite well but scratch arc takes a little practice. My welds don't look as good as our welder guys at work but are perfectly serviceable. Weld area cleanliness is very important and so is proper grinding of the tungsten.
Get some clean scrap and practice. Check youtube; I'm sure there's plenty of how-to videos to help get started.