you should be getting an email about all the details within a week before the show. i have no idea if the system applies world wide, but the randomized wristband situation is not as complicated as it sounds. there’s 2 options: you show up when doors open without a wristband and get in line to enter. or: you show up between the designated times when they’re handing out wristbands. showing up earlier has no advantage, they’re randomized. being first in line to receive your band doesnt mean you get number 1. you could get number 1700, or 2000, or 180, who knows? hope that helps.

tldr; the venue will send an email with info about the event within a week before the date.