If so what are a few reputable domain registration companies?

I have a very catchy domain name, and a hosting server laying around for about a year now. I want to start some type of online business, but I’m only sixteen. What I want to start is a business that will get me some money in my pockets, not a billionaire. What are some good ideas I should start? I’ve tried selling my things on ebay, but that’s not really what I want to do. I want to provide a service, or anything on my website to make money.