Drone as in "Quad" ...???
Plenty of info out there that is tried and proven without having to re-invent the wheel.
Especially when you start to have things buzzing around at head height and above.
Old one but still relevant to some degree........
Still penty to learn so don't think by doing this it is "plug and play" by any means.
https://www.youtube.com/watch?v=2X9AdNUApqw