If you haven't already, you should read this thread, Newbie to guns? Need help? Where to start?
This is full of good info and will help a lot with new shooters. Any gun from a reputable company will probably serve you well. To me, the most important thing when looking at a first gun is how it feels in your hands. If I can't hold the gun comfortably, I wouldn't buy it. Try a few out, see what you like best, and make your decision. Also, it is a good idea, if possible, to rent some guns from a range to actually fire some rounds. Good luck to you, and be safe.