For the original poster...
A couple of mag pouches and a decent plastic paddle hoster are what I recommend for starters. In fact, your pants pockets work fine for mag pouches until you figure out what you want or have the money, so you don't have to buy everything at once.
I'm currently using a BladeTech paddle for my Beretta 92x series SSP guns. It works well. I'm using a Fobus paddle for my P220 in CDP. I like the BladeTech much better than the Fobus.
For mag pouches I highly recommend Wilson Tactical. I was using BladeTech pouches until asking Ernest Langdon at one of his classes why I always have to draw the mags so carefully and could never seem to reinsert on the tac loads.... He looked at my gear and said to toss 'em and get some Wilsons. I did and couldn't be happier. Super fast mag draws and my tac loads couldn't be better.
rvb
edited to add: I like to have 2 single mag pouches vs one double. Easier to position where you want and have room between the mags for better grabs. Also, if you CCW and you want to carry a spare mag, you can just use one of your single pouches.
For the "concealment" aspect, depending on weather, sometimes I just pull my shirt or sweatshirt over the gun, or take an old Levi jacket or old leather jacket. Of course in the winter I'm usually wearing a heavy coat anyway. There are tricks you can do to make draws faster (coat hanger sewn in the seam along the zipper, quarters in the pocket, etc), but with proper practice on drawing from cover the tricks won't help much (I don't use them.. maybe when I make master
).
edited again to add: I recommend plastic (aka "Kydex", etc) paddles for new practical shooters, as you don't have to worry about the holster collapsing which can make re-holsters tricky. They are cheap (~$45 for a bladetech paddle), easy to draw from, and easy to holster into. On a side note, take your time holstering if you're new to it. Safety first, and no one ever won a gunfight by being the fastest to re-holster.
rvb