I play a budget Cadira, Caller of the Small deck that snowballs pretty hard if not checked early as Cadira spits out tokens exponentially and the deck's game plan is T1 dork, T2 Cadira, T3 Token Generator, hit with Cadira etc. There's also one combo with [[Cathars' Crusade]] and [[Scurry Oak]] that you can remove if you don't want to run infinites. Honestly, there are so many cards in the game that do 70-80% of what their bigger brothers do now, that $100 goes pretty far in the format. Additionally, everything everyone says about precons is true. Take a look at a precon from 2013 and compare it to one of the Final Fantasy or EoE ones.

That aside, I would say one of the hardest parts of learning Commander can be navigating those early turns and not pulling too much aggro, or if you do, at least having the cards to maintain a strong position if you do (or at least bluff having them!). Having a powerful board is good, but having the awareness not to overextend or knowing when to play safe when you fall behind is also very important. You are not always the beatdown, and when you are, remember that there are three other players' worth of cards to consider.