If I were going to decide to grow, i'd read about it for about 8 hours a day for a few weeks. then take some seeds from a bag of killer stuff i got, and try growing them before spending money on seeds. Everyone makes mistakes in the first grow , hell i've made them after years , LOL. Try dirt under floros for an inexpensive go at it, if you're sucessful, you can upgrade the lights to hps and then use the bought seeds.
peace
heart
also check your local laws on growing, you'd be surprized at the difference in penalties for poss. vrs. growing.