New keys·Index fingers stretch inward, then come straight back. That is every vowel, without leaving the home row.
WPM0
ACC—
DONE0%
iii ddd idi did idi did id
Left Index
Dvorak lesson 5 of 20 — it practises I · D on a home row of A O E U · D H T N S, vowels under the left hand. By this point you're typing with 10 keys, accuracy before speed.