Honestly, I hear people say things like this all the time.
My app will be the next Facebook/Uber/Tinder, I just need someone to build it for me!!
You have to face many problems, some of which I'm sure you've already thought about.
That said, I don't know much about building a business. It's a very different skillset from building an application. If you wish to learn application development, I can only recommend what has worked for me, but that involves years of school, hours daily in front of a computer coding, and building many different things. It's not exactly the "make an app, sell to Google, retire" plan you have.