First of all, ask your orthopedic doctor if fracture healed properly or not.
Next Steps
If yes than start with Ankle toe movements in which you have to stretch your ankle on both the side (up and down). stretch your calf muscle using towel. do toe curls. try to hold a pen and nepkin with your toes. try to go on toes n on your heel. in progression, you can walk on your toes and heel. do ankle rotation movements.
Health Tips
apply ice at painful area followed by any pain reliving gel.