I used Typing club's Typing Jungle[1] for several months every morning for 15-30 minutes to go from slow hunt and peck to touch-typing at 60-70 WPM. They have almost 700 lessons of increasing difficulty.
Keep in mind that those lessons are for typing normal texts, not code (not enough lessons incorporating special symbols). It worked well for me since I don't care about speed that much when typing code. Being able to type prose much faster is more important to me.
I have typing.io[2] bookmarked for practicing typing code. I never really got into it since I feel like I get enough practice when writing my own code.