[Moose408]

Improving your reach takes time. It’s fine to use your pinky in most cases although most people struggle using the pinkie in the beginning because it doesn’t have a lot of strength

Tony has a stretching routine in the Skills courses, it is less about up improving your reach but does help.

Another thing to pay attention to is your technique. Lower the thumb on the back of the neck, and make sure your knuckles are parallel to the bottom of the fretboard by moving your elbow close to your side. If your knuckles are not parallel it is very difficult to get the stretch needed (it took me 9 months to figure that out).