Daytona, do you have any experience carrying at all, concealed or otherwise? The options for carry methods vary greatly, and as people vary greatly as well, the opinions you'll get could be overwhelming.
If you know anyone that carries (ideally, a similar firearm, but not necessary), it would help if you could try their rig out, to at least get a gross estimation if that particular carry method (IWB, OWB, amount of cant, position, etc.) may work for you.
If you know of any defensive pistol matches held in your area, it may be a good idea to visit one and have a look at the equipment being used. Ask questions, see if the shooters will let you try their rigs.
Fortunately, the Glock is a fairly common handgun, and you may be able to try off the shelf products to get a feel for what you may want as well, and then perhaps order something from a custom maker like Little Bear or 'semi-custom' like Crossbreed. Many will buy a cheapie holster by Uncle Mike's or maybe Galco while waiting for their custom holster to arrive. With a fairly common design like the Glock, that could be an option for you as well.
I know I'm not independently wealthy, and have very little extra cash to throw around, so I was very lucky in finding a good holster that fit me well on my first attempt, and avoided the dreaded 'holster drawer' of holsters that didn't quite work out.