I highly recommend starting with one of these: Solemn SimulacrumSolemn Simulacrum, Skyclave ApparitionSkyclave Apparition, and Whirler VirtuosoWhirler Virtuoso
Dimir Control (16 players): Dimir Control makes the most of the new set, exploiting card advantage from The One Ring and Sauron's Ransom along with free interaction like Force of Negation and Subtlety to take control
It's unlikely to see much play, dealing 120 damage from four psychic energies, two of which have to be discarded, but it's worth getting for the art alone
9 Gix, Yawgmoth Praetor Attack, Draw, Repeat Yawgmoths long-awaited second-in-command more than lives up to the hype, proving just as powerful in Commander as he has in other formats
We always recommend you start off with an MTG precon before learning how to build a Commander deck
Four creatures are a lot to have on the battlefield at one time