Welcome from Minnesota, have a look at the
EVO II FoxFury Saddle as it might work for your insta if placing on top, to carry underneath you would have to get creative. So far the only accessory that have found hard to find for Autel vs. DJI is a bracket for attaching gopro type mounted devices to the underside. Granted, you have to search a bit more, however you should be able to find ipad mounts, range extenders, leg extenders, lights, carry/release devices, prop guards, etc. Granted, you wont find multiple vendors as well as not as many knock off or fake devices (e.g. like DJI batteries).
There are differences in the aps, as well as how the autel flies vs. different DJIs, so take your time, get to know the app, how it works, what is where, how the aircraft flies and handles, make adjusts to controller sticks etc, and practice practice practice. Oh, one thing to watch out for vs. DJI with Autel is your low battery alerts. On autel if you ignore the first low battery alert, and then get the second low battery alert, be prepared for the aircraft to want to start landing where it is. If you are not ready for that to happen and it happens unexpected, it can throw you off, so fyi.
Good luck and enjoy your Autel.