The truth is, it doesn't matter. You can pick just about any DSLR currently on the market, get into it well and take great shots.
What you should consider is what you'll be buying later on. If you plan to grow to no ends and possibly become a pro, then it's safer to bet on Nikon or Canon, if you know you'll go semi pro at most, then you can add Sony, Pentax/Samsung and Olympus to the bunch.
The basic techniques are pretty much the same you'd use with a compact camera with aperture/shutter speed priority modes and manual mode. If you have one like that, it could be smart learning with it first and getting a DSLR later on when you're experienced enough.