To get started you need an Apple-ID. You can skip this step if you already have one.
How to setup an Apple Developer Account
Continue enrollment as an individual
Continue enrollment as an organization
How to invite Zappter to allow to manage your account
Learn how to create your first app and app identifier
Create your apple certificates and upload it to Zappter
How to easily create and upload your provisioning profile
Learn how to create a push-certificate
Learn how to generate the app store connect key.