Android - Register for a Google Play Developer account (Mandatory)

To build your Android app, it is mandatory to register for a Google Play Developer account. 
This is also mandatory even if you want to distribute your application in another way besides the Play Store. 

There is a US$25 one-time registration fee to pay to Google directly.

You will have to choose a developer account type.
Google Play offers two developer account types: Personal and Organization, which you can learn more about here .
Be very careful, once an account has been created, it's not possible to change the entity type associated with it.
It is very important to choose carefully the entity type of your account.

The main differences between the Personal and Organization account types are:
1. The required information  to create a Play Console developer account to go through Google identity verification are different depending if you go for a Personal or Organization developer account.
Organization accounts require a D-U-N-S Number

2. App testing requirements for Personal developer accounts: 
Developers with personal accounts created after November 13, 2023, must meet specific testing requirements  before they can make their app available on Google Play.
Personal accounts must run a closed test before they can apply to publish their app to production.
At least 12 testers must be opted-in to your closed test when you apply for production access. They must have been opted-in for the last 14 days continuously. 
Only when this close test is finished, personal developer accounts will be able to submit their Android apps to be published to the Play Store.

To register for a Google Play Developer account, follow Google's instructions below:
https://support.google.com/googleplay/android-developer/answer/6112435

If you need help during the process, you can contact Google directly via the button "Contact us" at the bottom of their online help.

Solo mode:
Please follow instructions of this online help: Android - First submission of your Android app on Google Play Store (Solo)

GoodBarber Takes Care service:
Please follow instructions of this online help: GoodBarber Takes Care submission process