I have been practicing typing on Colemak-DH on my Planck keyboard regularly all week, after a two week hiatus. Keybr still has not enabled more than the initial six letters in its typing practice. It assesses my confidence on each key, and it still is not high enough for me to move on to the next letter.
It is slow going, even though I have memorized the layout 95% at this point. Looking at my history on the site, however, shows me that I have improved greatly since I started. I keep going, little by little, each day. I tonic it will be worthwhile in the end. The layout makes so much sense to me on my little ortholinear board, because with it I barely have to move my hands to type, which is pretty cool.