Storms, wind, lightning, this is your brain on 1,000,000 volts. Don’t.
Minimum two meters of water to start, four meters of water for any height above two meters.
Obstacles and obstructions are not only under or on the surface, when you are flying be fully aware of the 3D environment in all directions!
Leave the sand dives to the volleyball players, keep in deep water.
If you don’t know what lies under the water, don’t dive headfirst into it.