Heavy or Light drumsticks for practicing?

I am getting a snare practice pad and I am wondering what kind of drum sticks I should get, (heavy & fat or Light and skinny) I'm going to try out for snare in marching band, and they use really thick sticks, but I also want to learn to play drum sets, which I would prefer really thin and light drumsticks. I can always get another later but which would help me improve the most before tryouts next year. or a medium weight and thickness?