Welcome, and congratulations.
I'll give you my 2 cents worth. As far as selecting a gun, I suggest going to a range and trying a broad selection of what they have available. It's been my experience that guns are a little like golf clubs in that what works for one, doesn't work for others.
As an example, you will find people that stand by a Glock as the most reliable gun available. While that might be true, they don't sit in my hand because of the way the backstrap is, so they are just plain uncomfortable for me. Since I don't feel comfortable holding them, I never consider purchasing one.
Also, I know you've taken a safety course, but if you can, find an experienced shooter to go with. A few tips from someone who has been doing it for a while can go a long way to helping you select the best gun for you.