Extended battery on the M5P will trigger RID and will put your drone overweight so it needs to be registered in the US. However, you get the benefits of the longer flight time.
Here's one source for a genuine DJI M5P Plus battery for a...
Meh. I always use RTH to come back and land (closely supervising, of course). I've been flying over 10 years, fly full acro FPV drones, etc. Skill isn't an issue, nor is "practicing" holding the stick to fly back, or manually landing.
Flying...
When I'm done, I hit the RTH button and let the camera drone come home; however, when I fly FPV I rarely never use RTH. It's the type of drone you can bring it home in a blaze of glory every time.
Apparently this is the "Avata 3". I read somewhere this was mistaken for the Avata 3 turns out it's the Avata 360 instead. Way back then, the confusion is understandable since this looks almost like the Avata 2. Who knows.