Sure, it's simple, but it's extremely psychologically taxing. No surprise people rely so much on alcohol.
I personally find alcohol to be vastly overrated for removing inhibitions. A few drinks and I'm still as tightly wound as ever. A lot of drinks and I end up having all sorts of unpleasant bodily effects instead.
Could you give some specifics? For example, does this look like repeatedly trying things that make you a bit uncomfortable, and CBTing when you have those uncomfortable feelings? Is it helpful to do this with people you already feel safe around?
It's not really complex, it's like anything else you'd study - mindful, focused practice; pay attention to details; iterate.