as far as keeping safe my top two tips would be:- 1 - wear a helmet, 2- take some lessons! (if you've not had some)
The helmet will keep your brain safe for when you crash hard, and yes it will happen at some time...
The lessons will also make you safer and help you progress at a much more rapid rate. You should be body dragging pretty much straight away if you can control the kite on land.
Then it's down to time on the water!
Good luck
p.s. James who runs this forum does lessons locally.
Work to live... life is too short