Post Sural Nerve Removal Left Foot

Any advice for post surgery workouts to get my feet ready to lift again.

I have broken my left foot traumatically 6 times since feb 09. & with this last break i was forced to have the sural nerve and dead/damage tissue removed from my left foot. Im back in the gym but not on legs or impact cardio yet. Any advice to get a good base for lifting legs and impact cardio again?