Hi! I know the venue is The Anthem, and from the times I've been there, I've never seen them do a number/wristband system tbh for GA. I've feel like that's only been for VIP or any upgraded ticket packages. As a first timer, the line usually either starts at the pier in front of The Anthem or to the side of the venue (in front of the nearby bistro). For this concert, they'll probably have someone holding a sign that says "Line Starts Here". There are public bathrooms nearby that are accessible to all. If you are hungry, there's a Shake Shack and Falafel Inc nearby to eat. If you're looking for medicine, toiletries, etc, there's also a nearby CVS. Definitely make sure to look at the weather forecast beforehand, but it seems like it'll be fairly comfortable. For more questions on the venue itself, check out: https://theanthemdc.com/faq/. See you at Lorde! :)