Well, about ten years ago or so when I first got onto the net, I was in the same position.
I was in desperate need of a refresher course (to combat the hunt-peck tendency) since I hadn’t really needed to use a typewriter since my college term papers.
I had originally learned touch typing back in high school but that was many moons ago and I didn’t want to continue my tendency toward sloppy hunt-peck typing.
But I basically resorted to repeatedly typing the old sentence I used in teaching handwriting to my third graders:
“the quick brown fox jumped over the lazy dogs”
Since it contains every letter of the alphabet, using it repeatedly was enough to regain the muscle memory needed for touch-typing.
But nowadays, I’m basically back to hunt-peck (with one finger yet) on a teeny little iPhone screen :)
Ah, the circle of life…