First let me just say welcome and thank you for choosing this site, it gives me the opportunity to spout off! Anyway, a bit about me, I am an instructor and I teach concealment. I have dealt with first timers just like you many, many times.
Listen to Thumper, a cheap holster will end up in the box in a few short days. Spend the money (if you are serious) and buy a good quality, CUSTOM holster meant for YOUR gun and you. Expect to spend anywhere from $100-$250 on a good holster. Anymore than that and you are getting robbed... unless you are having the poor soul making the holster work his butt off with detailed designs or something.
But before you decide on a holster, you want to know what KIND of holster. That depends on what your clothing style is. Do you tuck in your shirt? Are you a jeans and loose tee shirt person? Wear a suit to work? Shirt with a loose over shirt? etc. Depending on that, you can choose your style.
A bit about each style. IWB (inside the waist band), many first timers think this is crazy. Shoving something INSIDE their jeans. With a good holster its comfortable and it serves a purpose like no other. CONCEALMENT! This is the best way to conceal a gun. However the only draw back is if you wear tight pants, you might consider looser fitting clothing. This is also how I carry. I wear a full size XDm at the 4:00 position in a IWB with a loose shirt. I can draw and put two rounds in my target in under 2 seconds.
Next is OWB (outside the waistband). Cross draw or strong side, its totally up to you. Harder to conceal only because you have to hide more of the holster and gun with a loose shirt. But, its comfy! I dont recommend cross draw, its slower, IMO, and you have the potential to "sweep" innocents.
Shoulder rigs: easy to conceal especially larger frame pistols. If you have wide hips (nothing bad) then this might work better for you. One draw back is you always have to have a shirt over top. Its not that bad, this goes for every gun.
SMB (small of the back) if you feel it necessary to carry this way then dont let me stop you. I dont condone this way of carry. Only because if you get knocked down, pushed up against a wall, your done. The bad guy can see if you are printing or not. You cannot. But again, if you like it go with it.
For a good holster, check out my post entitled "Check this out, my new Pure Kustom."
If you have ANY questions, feel free to ask. PM me if you dont want to post.