Find out if the range offers a basic handgun class - and take it. That's the best advice I can give you. Do your research here as to make, model, caliber, trigger action etc. then rent a bunch of guns so you can experience the recoil of different calibers and the feel of guns with differing actions (SAO, DA/DA, DAO, Safe Action etc.). Buy the one that feels and shoots the best for you.
Welcome to the shooting arts!!