1- Dont listen to your sister about anything involving training ever again.
I have a lot of eperience with ankle pain. I have no idea what your problem is so I dont know if any of this would benefit you but stuff like this made it so I could still powerlift, and walk for that matter.
I've had 2 petty major surgeries and will likely need more due to playing stupid football for 10 years. Search Dick Hartzel, the jump stretch guy, and check out his traction exercises for ankles. That shit is incredible. Relieves a ton of pressure and greatly helps with pain. Also, stretching in every direction with bands to keep it mobile has been a big help. Odds are, the reason it hurts is either something is tight or something is weak. And if something is weak, it gets tight to compensate.