What is the next step I should take to protect my idea?

Patents, trademarks, and copyrights protect very different types of intellectual property. A patent attorney can help you understand this distinction better. Briefly, trademarks protect the name/logo/design used in connection with the sale of goods or services. Quoting from the US Copyright website, copyrights protect ". . . original works of authorship including literary, dramatic, musical, and artistic works, such as poetry, novels, movies, songs, computer software, and architecture. Copyright does not protect facts, ideas, systems, or methods of operation, although it may protect the way these things are expressed." This is an important distinction. Trademarks or copyrights will not protect an invention. So doing a search for trademarks, or a search for copyrights, will not be of much help in determining whether an invention can be protected. For inventions, there are patents. Retaining a patent attorney for advice and assistance as soon as possible is critical so as not to lose important rights to an invention. A patent attorney can help with a prior art search, and help interpret the results of the prior art search to determine whether an invention might be something that can be protected with a patent. A patent attorney can also explain what to do and what not to do to maintain rights in an invention.

From the wording of you question I feel that you need professional help. You are confused with a lot of the processes - search - filing - drafting - trademarks, patents copyrights, etc. Consult a local patent attorney.