Don't rush! You'll be chomping at the bit to taste your first brew, but the longer you wait the better. I usually keep my beers in the primary for at least 10 days, if not longer. If at tasting time, you're not happy, let the beer condition in the bottle another week. You'd be surprised how much the flavor can mature with time.
my recommendation is to buy quite a bit of craft beer (enough to last 3-4 weeks) about the time you brew. If you always have beer in the fridge, you will be able to wait as the beer matures. If you run out of beer, it will be too tempting to grab a homebrew that isn't done conditioning.
also, if your LHBS makes their own kits, you might find those to be really nice for your fist couple batches. If they are making their own kits, you won't have the issues you can get with kit beers (Old yeast, old extract, Kit and Kilo, etc)
Overall, welcome to the obsession, once you try your first homebrew, there is no going back!