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Upload an app
After you’ve signed up for a Google Play developer account, you can upload apps to Google Play using your Play Console.

Tip: When building your app, use Google Play’s recommended publishing format, the Android App Bundle.
Create an app

  1. Go to your Play Console.
  2. Select All applications > Create application.
  3. Select a default language and add a title for your app. Type the name of your app as you want it to appear on Google Play.
  4. Create your app’s store listing, take the content rating questionnaire, and set up pricing and distribution.

Get your app ready for testing or production
To get your app ready for testing or production, you need to prepare and roll out releases to a specific track.

A release is a combination of one or more build artifacts that you’ll prepare before releasing an app or update to users.
Manage APK files
Package names for app files are unique and permanent, so please name them carefully. Package names can’t be deleted or re-used in the future.

Source link: https://support.google.com/googleplay/android-developer/answer/113469?hl=en

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