This is a hell of a project man (even if it doesn't go pew-pew)! Congratulations in advance! When we bought my house I converted a 400sf outbuilding into a studio, gutted it down to the studs. We (actually approx 90%
I) rebuilt the interior with 1.25" thick, decoupled wall/ceiling "leaves" for sound dampening - it's basically air-tight and heavy. That was a TON of exhausting work, so many details, and I did
nothing else with my free time. Now I almost never go out there to play lol!
Anyway, congrats on your progress here, this is going to be an awesome space!! Concrete/masonry is about the only piece of construction I haven't done, this looks amazing! The concrete work seems scary and powerful, if you can lay foundation you can make anything! I will definitely be checking out your progress.