Unfortunately if you have an idea that isn't copyrighted, someone else may steal that idea. I had this happen with an idea of mine (not a business idea) and there is literally nothing you can do about it.
I am not going to try to talk you out of it, but before you get too serious I would really have a think about what puzzle has said, and probably go talk to a business consultant and lawyer about your ideas and ask what you would need to do, and what are your possible legalities.
There are things you may not think of that are super important, or possibly even a large cost you may not have thought of. I am looking at going into a partnership in a few years time, but before I do I want to research as much as I can on the type of business and work out exactly what I need to do, where possible down falls of the business are, rough costs, and god knows what else. I don't want to go in with rose coloured glasses on, and I would strongly suggest you take yours off before putting any money or effort in to this business. Business is tough, and you need to be ready for all sorts of things that could pop up. If you can't deal with some friendly advice now, I would suggest you probably look at something else apart from running your own business.
Good luck with whatever path you wish to take
