I would also add, SAVE YOUR STARDUST! It is worthless to use stardust at the beginning of the game. I would recommend waiting until at least level 12 until you decide to actually use it, even then I would be cautious not to use too much. The reason is because you can quickly level up and find a more powerful Pokemon than the one you are wasting the star dust on. I would recommend using it only when you find a strong pokemon that you know you can use for a while.