How to get registered for the Android 10 beta version or when I'll going to have the android 10 update for my A70?

Can anyone suggest me, how to get enrolled for the Android Q beta update program?

I am facing the moisture detection issue in my Samsung A70 my phone is 25 days old and never been in touch with any kind of moisture. When i turn off the phone it gets charge as i turn on, it keep on showing the same error moisture detected. Could an...