My learning method.
Character speed 22
Word speed 10, 11, 12
Start each new lesson at word speed "10, 11". After reaching 90% few times in a row, bump up the word speed. After reaching word speed of 12 at 90% few times in row, move on to the next lesson.
Sometime it helps with "Code Group" using custom characters.
Select "Custom characters" and select your last 6-7 learned characters.
Do the the 90% at few times in a row @ 10, 11, 12 word speed method. I find that this helps me in learning character melody into my brain.