Check out https://type-fu.com https://type-fu.com for a programmer-oriented typing tutor. It has a built-in keyboard layout editor with presets for Colemak and

Check out https://type-fu.com https://type-fu.com for a programmer-oriented typing tutor. It has a built-in keyboard layout editor with presets for Colemak and Dvorak (and many others). You can also paste your own code snippets for practice.