[Concern] I took off the half-cast after 2 weeks, when can I start exercising?

I had a cast on for two weeks.

Starting tomorrow, I will be removing the half-cast.

Spending two weeks doing nothing but common walking and indoor cycling.

The thigh muscles I had are all gone, and now it's just soft fleshㅠㅠ

When will I be able to do running exercises like jump rope or running?

I saw on YouTube that I need to do ankle rehabilitation exercises.

Can I only walk about 6 weeks ago?

So far, walking still feels a bit uncomfortable and painful.

Should I go back to the hospital?

When is it okay to start walking or cycling exercise?

I'm curiousㅜㅜ