I would suggest you search online for examples, something like "simple mobile app privacy policy". Also, if you want to be very simple, you can just say exactly what you said in your question: "My app is very simple we do not sell any users info, and the only info we collect is their name and email address. (Name is used for the UI for their profile, and email address is used as their username to login)"

See information here, including an idea for how to do what you're trying to do: [https://developer.apple.com/forums/thread/130097]