Creating an app

Hey! So I have a cool idea for an app that I think a lot of people would really enjoy and use, and I've looked around and nothing exists quite like what I'm thinking. I've talked to multiple friends and they all agree it's a great idea and would probably use it themselves. I have no idea how to go about creating an app. Any ideas how I should go about this? Would be willing to split for a large percentage of partnership as I'm literally only bring the idea to the table.