What we saw at the ToD launch - it looked like the Waiting Room was randomized when it went live - meaning that the first person in the waiting room wasn't the first person in the queue.
It was also kinda messed up at the beginning - people who joined the queue early sometimes found themselves waiting for hours while people who joined later got in quickly.
I would highly recommend that people use multiple browsers (like if you normally use Chrome - also use Firefox, Edge, Safari, etc.) and/or their phone at the same time. Save one of them to join the queue after it goes live.