Now, you will have to create what is called a track inside your Google Play console. This is basically a setup to manage your testing processes. 

Here, you will be able to upload your APK, distribute it to a selected group of people, and track feedback as they test. You can manage both alpha and beta testing stages, too. 

Follow the following steps to set up a beta track: 

1. Login to your Play Console and select your application.
2. Locate App releases under Release management and select Manage under the Beta track.
3. Upload your APK in the Artifacts section, then expand the Manage testers section.
4. Under Choose a testing method, select Open Beta Testing.
5. Copy the Opt-in URL and share it with your testers.
6. Provide an email address or URL next to the Feedback channel in order to collect feedback from testers. Then, click Save to, well, save it.