If you make movable panels, you're not going to isolate anything.
Isolation requires mass, density, and above all, air-tightness.
You could isolate the drums in the latest picture you posted, but that would mean building an entire wall. Low frequencies (such as from drums) are the most difficult to isolate.
You'd need a pretty heafty wall there to do it.
It could be done, just depends on how far you want to take it.
You mentioned this being part of a living room?
Then this is not a dedicated studio?