I wrote a email for them to include the Colemak  layout in their typing program. 
And they finally have! 

Here is the website: https://www.sense-lang.org/typing/tutor … EN_colemak

This typing tutorial teaches you Colemak in 15 lessons.  And you can even paste your own text, to practice with.
You can even type news articles for practice.

A picture of the hands pops up if you make a mistake. This picture tells you which correct finger you should use.