You will now learn the "G".  

Look down at your keyboard. Notice that the "G" is beside the 
"F".  The "G" is keyed with the "F" finger.  Without removing the
other fingers from their positions on the home row keys, reach 
from "F" over to "G" and back to  "F" again. Practice this reach 
until you feel comfortable.

Now, practice this reach as it is called for you.  

Wait for the tone before you strike the key and think each key as
you strike it.