As for etiquette, please use a chalk ball that you squeeze inside the pouch, and not loose chalk. Makes the air, surroundings better for everyone.
I'm not sure why it hasn't been mentioned, but get a competent safety person you can trust. By "Safety person" I mean the one holding the other end of the rope, securing you if you fall (I'm not knowledgeable of the English nomenclature, sry). Remember to double-check each others knots!
As a final note: DON'T LOOK DOWN (or do, that's fun too!:)
I'm not sure why it hasn't been mentioned, but get a competent safety person you can trust. By "Safety person" I mean the one holding the other end of the rope, securing you if you fall (I'm not knowledgeable of the English nomenclature, sry). Remember to double-check each others knots!
As a final note: DON'T LOOK DOWN (or do, that's fun too!:)