Дегустация Horn of the Abyss

Wicc, here are two questions that are not covered in the rules: - Who starts the map drafting first? - How is it determined who gets red and who gets blue? Logic suggests that it should be a coin toss first, then everything else, but nevertheless. And the second question: can the player who chooses a hero change their choice after a restart? Logic suggests that they can, but it would be better if it were stated in the rules.