Seeking Home Basement Vocal Booth Design Assistance

[Sword]

Greetings.
Would anyone be able to give me some tips on Home Basement Vocal Booth Design? I can supply pics, dimensions, and any other info that may help. My home is 98 years old I am pretty much starting with framed-out(2"X6") studs over irregular concrete block "old school" mortared walls and a bare floor joist ceiling. I am wondering should I insulate behind the drywall and/or ceiling, if so what would be the best type of material for this? What is the best thickness for the drywall? I am working with roughly a six foot X 8 foot area of space for the booth with a ceiling height of 7 feet 6 inches. Any ideas would be really cool.

Thanks