Achilles tendon….rehab

I ruptured my achilles july 2nd..had surgery july 8 ..and am now off the crutches and about 2 weeks into rehab..walking slowly.I am a little worried at how I am going to get the tendon to stretch. Right now I have about 2%movement from neutral position in the dorsiflexion(ankle upwards position) wheras I have 18% in the other ankle.I do all sort of exercises towel pull rubberband foot presses etc. How long does it take to get it stretched and are there any exercises one could recommend .In the downwards and side to side movement i am doing fine.Thank you.