Go to
Mueller's and get a catalog.
They have a great selection of darts and accessories.
Even the good darts are reasonably priced. If you can't try out different kinds of your friends, just pick some that you like. If you're just getting started, you haven't really set yourself into a preference yet. Chances are, whichever darts you get and learn with will be the darts that feel most comfortable to you.
I have about 8 different sets now, finally narrowing it down to the best combo for me, but for the most part my best darts are whichever ones I've gotten myself used to.