Staying in business is the problem. Every great entrepreneur had some false starts until he or she managed to stay on business, make some money and build on a great idea. Starting its easy, and ideas are cheap. Executing with success is the main difficulty and on the quality of business plan execution depends everything.
If you can execute on your idea, you are on the right way. It doesn’t need to be original, there are not many original ideas these days, you just need to execute it properly. Hundred maybe had the same idea, but poor execution made them fail. This and the fact that they didn’t care about their business as much as you do. If you are convinced you can do it, then you wii do it.
You will fail several times. Get ready for this and have the plan B, C and D in place if possible. And, most important, be ready to absorb the shocks of failure. You will learn from developing your business, and you will learn from your failures but also make yourself a lifelong learner.