You can find the Avata Product Support page here.
Additionally, you'll want to get a charging brick that is a least 65W. Here is DJI's offering which I use, but also have several of these around the house any they are great.
Hang on to your Avata and Fly More Kit and get the right charger and...
You also may be interested in checking out AirData. You will get a LOT of important data uploaded automatically to their site once you get it all set up.
The Controller 2 that came with my DJI FPV was originally used to fly my Avata upon release. At the time the Controller 2 was extremely difficult to find due to the new Avata release. I wasn't a fan of using one Controller 2 for both birds, which is why I wanted a second. Eventually I got a...
Everything needs to be turned on, soooo, my guess is that it will update the aircraft too. I really don't know as my Avata was already updated. Great updates on the MC2. I'm not sure I'd have bitten unless I had the $90 OFF from DJI.
I'm in the same boat, but won't part with any of my fleet. Avata has taken over 90% of my flights, but Cine and the Mini 3 still get the "boring" flight duty. 🤣