I recently came across a great service https://orangesoft.co/blog/how-to-publish-an-android-app-on-google-play-store that really helped me understand how to publish an android app on the google play store. If you are just starting to understand development and do not yet know all the intricacies of publishing, this service can be your salvation. The entire process is very clearly explained there - from creating a developer account to downloading the application and setting it up.