Colonisation seems like wishful thinking. It doesn't matter that the pressure outside is 1 atm when you have an incredibly corrosive atmosphere which will chew through all realistic candidate materials in weeks, a need for perfect atmospheric seals to keep out the smell of the H2S in the atmosphere, and roaring convection currents that are going to give any balloon occupants a wild ride.

It's absolutely not going to be like floating peacefully in a balloon gondola on earth. More like an endless high-G theme park ride.