I really need to do this. At one point I got pretty far on https://www.typingclub.com/, but slid back to hunt-and-peck as soon as I stopped it. I'm learning Vim now (which has a similar effect where you get immediately much slower before you get faster), and one of the guides I was reading said not to waste your time with Vim before you can touch type.
That said, Vim is easier because as soon as you understand how to switch in and out of insert mode it works as a regular text editor. Touch typing really brings me to a standstill.
After a few years of also failing like this I combined learning touch typing with switching to Colemak, and that finally made it stick (though ruining me for normal qwerty, but it was worth it). It takes a while though and there will be a really frustrating period when you can’t type either qwerty or Colemak.
That said, Vim is easier because as soon as you understand how to switch in and out of insert mode it works as a regular text editor. Touch typing really brings me to a standstill.