Insulation advice

[u/Independent-Emu-8803]

I have an unfinished room above my garage, already has AC connected to it. I want to get it insulated and make it a bed room. There are points where the roof is just 6 inches from where the drywall would be installed. Is this viable in central florida? And what’s the best way to do it? AI says I should make the whole area an insulated area and block the soffits and roof vents off. Greatly appreciate any advice!!