There are lots of good cameras out there. Check the pink links on Alcina's signature for current favorites or just read some of the threads here. I would not recommend that you dive with any of them at your level of experience. If you're sure you want to take pictures: Get one of these cameras and learn to use it topside. Learn to use full manual settings. Learn about aperture and shutter speeds and lighting direction. Then when you've got an absolute minimum of 75 dives under your belt, and you're completely comfortable with your buoyancy, deep diving skills, limited visibility skills, buddy communication, emergency skills and how much air you use, take it underwater. A new diver, no matter how adept, doesn't have the experience to combine the task load of taking pictures with the very serious task of safe diving.
Also, cameras come and go quickly these days, and when the camera is discontinued usually the housings are already long gone. You might wait to get the camera/housing at the same time when your diving level affords it. Taking an underwater photography specialty course after you get your advanced open water is a good way to get started.