I am on vacation right now and writing from mc Donald's on an iPad so excuse the errors-this thing drives me crazy! Here are a couple of things for you to work on the rom
Lie on your back, bring your knee to your chest and let gravity do the stretch for you. If this is too much use your good leg to support.
On a stationary bike-rotate the pedals as far as you can. If you can't do a full circle just work back and forward to start the stretching for both knee and ankle. when you cando full rotations, lower the seat for more stretch.
Put your foot up on the second step and do a gentle lunge forward, hold,repeat. I also found an armchair good for this.
When I get home I will copy what I have for you. Until then your accelerator will help you strengthenas well.