I would go with the 9mm for a first gun. I would stay away from Glocks as I feel is not a beginners handgun from a safety stand point. The 44 mag has to much recoil to learn to shoot well and too expensive to get in enough practice time.
“There are hundreds of millions of gun owners in this country, and not one of them will have an accident today. The only misuse of guns comes in environments where there are drugs, alcohol, bad parents, and undisciplined children. Period.” Ted Nugent