Welcome to the site!
I may as well be the first one to say "go for the Glock!".
The G19 is a fine choice; my son picked a Glock 19 for his first handgun, and he shoots it well. Small enough to carry, large enough to shoot well, simple to operate and maintain, darn near rustproof, reliable, wide availability of parts, holsters and accessories; Glocks are hard to beat.
Unless you need one of the features only offered on the Gen4 models, I'd recommend the Gen3 (they should be less expensive, now that the Gen4s are out).