You can use any cardpool you want to serve as the base for your first cube. I say try it, and see how it works. You'll have to acquire some mana fixing that you can use as a base for all your decks, but model your curve after a cube list you like, and slowly update the cards in the list as you go. No cube is ever "complete" ...and updating the list is half the fun!
Welcome to cubing!
My 630 Card Powered Cube
My Article - "Cube Design Philosophy"
My Article - "Mana Short: A study in limited resource management."
My 50th Set (P)review - Discusses my top 20 Cube cards from OTJ!