Скачать или смотреть SQL Server Always On Availability Groups 101

I got a few AG-related questions at https://pollgab.com/room/brento so I did an Office Hours discussion specifically focused on them. Here's what we covered:

00:00 Start
00:24 Paul Hunter: My company decided to move to AZURE. The person in charge of moving the SQL Server decided to put up an AG (I voiced my concerns over management of an AG). Now I am going to be in charge of managing an AG. Do you have any advice on how to quickly learn to manage an AG?
30:14 Bandhu: What's the max number of DB's you would not exceed for a single AG?
33:59 Dopinder: What is the top issue you see with clients running SQL Server AG?
35:29 Bandhu: Is there a good way to determine which databases a given app connects to (for the purpose of designing AG's)?