How fast does my credit score go up if I'm new to credit?

I tried getting satellite tv and also internet through my local ISP and they all wanted extra money because I am only 19 and don't have any credit. I applied for a Capital One Mastercard to start building my credit. I was wandering how fast my credit would go up if I spend $50-$100 a month and pay off the entire amount when I receive my bill and how many bills I would have to pay to get it to go up? Thanks.