Online Typing Practice for Programmers

I recently realized (when pair-programming) that I spend a rather obnoxious amount of time dealing with the fallout from typos. I have known how to touch-type since school, but this was only good for the non-symbolic keys, omitting the parentheses, bars, etc. we programmers use for syntax. I started using this site (and another similar one: https://typing.io/) and after two weeks, I've already noticed a reduction in errors — and a big improvement in getting VIM to do my bidding. I feel this is one of those areas where a small investment in training (say 12 hours lifetime total) has a big pay-off, so I wanted to share.