New keys·Feel the bumps. On Colemak they sit under T and N.
WPM0
ACC—
DONE0%
ttt nnn tnt ntn tnt ntn tn
Left Index
Colemak lesson 1 of 20 — it practises T · N on a home row of A R S T · N E I O. By this point you're typing with 2 keys, accuracy before speed.