Hey, it's great that you've got a business idea. I'm a Bussiness Student, doing really good, so I might be able to help you out a bit
What you need to think about is your competitors. Is there really a gap in the market? One thing I really reccommend doing is creating a Market Map. It's hard to explain it, but just search it up. It will really help you place your service in the market. IE, it will tell you your competitors and it will tell you if there is actually a gap in the market
Also, if this idea is really unique and there's nothing similar to it, if you're reallllly serious about setting up a business you need to look into having a patent. Not copyright for a service, a patent. These cost quite a bit, anything from aroud £10,000 if you're wanting something which keeps you fully protected from people copying the idea.
Need anymore help, send me over a message, I'd be happy to help! And good luck!