Creating an Apple Developer account is the first step to publishing your app in the Apple App Store. Here's a link with some more information on creating your Apple Developer account:
Once you've created your developer account and received your developer credentials, you can move to the next step. Here's some more information about Apple App Store guidelines:
The Apple App Store guidelines will help you understand Apple's requirements for distributing your app. If you have any questions about publishing your app on the Apple App Store, please contact your account manager, or email our support team at firstname.lastname@example.org.