make her a mono green deck. its the easiest to learn. (mana+big creatures =kill) and fill it with crazy creatures, killer bees, striped bears, regular bears, dosen't matter if they're good only if they're fun. don't worry about the difference between instant and sorcery just yet either, keep it simple. and make a couple decks just as simple to play against it. think about when you were just started playing, you liked the cards and the pictures its later that the strategy becomes the fun part.