I learned how to touch type qwerty by playing Mario teaches typing 2, which taught proper form. It was one of the video games I was allowed to play when I was a kid. However, I did learn a few things wrong.

I never learned how to use my right pinky for shift and use left pinky for every shift. I also don't know how to touch type numbers or symbols. I could probably learn that, but I don't have to use them very often, so it's hard to remember.