Cubensis are the easiest. Don't waste your money on a kit, get the shit yourself. There's a lot of guides on shroomery.org. the PFtek method is teh ez.

The main thing when growing is just knowing when to harvest, when to cut aborts, sterilization, etc...it's easy...past that, it's just using different types of fertilizers and spores. The time for harvest is different, and all that....but there are guides to everything nowadays. Shroomery.org is your best bet for anything mushie related.