serious beginner here. I have the A-E-D chord changes down, they are easy due to the pivot finger. I have a hard time changing between G-C-D since there is no pivot finger. Any tips?

BTW, I play the chords as follows (the number representing my finger instead of fret for illustration purposes)

G:
_4__________
____________
____________
____________
_2__________
_1__________

C:
____________
_1__________
____________
_2__________
_3__________
____________

D:
_2__________
_3__________
_1__________
____________
____________
____________