Looking for car Aircon advice

Hey guys

I have a 2006 Citi golf that I'm trying to pimp up a bit. I unfortunately know very little about cars

Sooo, if there are any car people around here, do you know of a place I could go to try get an Aircon fitted into the car? Or also, anyone that knows if it's even possible to fit an Aircon into an old Citi golf