Congrats and Welcome! You have made a fine choice in a firearm.
Your questions are welcome and don't be sorry. Take a look through a few threads just below this and you will actually find most of your answers.
I have to give another shameless plug to my
"Wicked" holster made by Eric of
HBE Leatherworks. I can't talk enough good about this guys work.
As for flush fit mags, just buy the compact 40 mags and put a regular base plate on them. Both MecGar and Promag are used by forum members here.
Enjoy the hunting and reading through the forum.