There's so many ways you could play with those images and make a nice layered composition out of it.

My advice would be to think more basic. My first instinct would be to use only the the background of the room with it's purple chairs and the curtains etc and then blend in the large musican playing the cello (?) I think it is. The big ass voilin thing anyhow

Start there ... use layer masks as well so you can have more control over the blending process and when you have him right ... maybe look at adding another musician to the fray.

Sometimes though ... less is more.