Hi Steve,
Before you can start functional rehabilitation, ROM exercise is needed. Once ROM is attained, you can start off with the strengthening of the ankle. Try to focus more on the peroneal group of muscles coz insufficient strength in this muscle group will likely lead to ankle instability and recurrent injury.
Strengthening covers isometrics performed against an immovable object in all planes of motion then it is followed by resistance using ankle weights, theraband or elastic tubing. Take note that resistance training should emphasize more on eccentric contraction.
When you have noticed that there is no longer pain and full weight bearing( FWB) can be tolerated then proceed to proprioceptive training.
Have a look on the exercises .
Hope you get well soon....