Unfortunately, it does not concern most users who will read the article. Let me tell you from the beginning because Android P Beta can be installed on several devices that Google points to. The reason for this and the reason it could not be overcome is that we will get permission from Google's own page.
Devices that can be installed on Android P Beta. Google Pixel, Xperia XZ2, Nokia 7 Plus and Essential Phone. You entered https://www.google.com/android/beta . You will need a Google account. Sign in. You will see the phone list on the relevant page. Your phone in the image is your voice. No selection can be made other than the phones here.
Click the Optin button. Accept the terms and conditions. Know that everything will be erased. Select System Update. If you are included in the system after this stage, you will receive a message. Your phone will receive an update notification soon. If the update notification does not appear, check it yourself without updating the system. Perform the update properly.
That's it. After this stage, you can start using Android P on your phone. Of course, this version is for developers. Normal users will not be able to cope with a lot of problems. I think it should never get infected.