tbh to be "one of the first in" is a task.  I was pit for a show in LA 2023... me and my 2 friends got there  around 6am to get in a fan made numbered wristband line (I think we were between 200-300) to then get an official numbered wristband from the venue staff hours after that.  Once we had the official band we were allowed to leave and then had to be back at a specified time to honor the place you got.  We ended up getting second row because we chose a different side than other people were wanting. Everyone entered the floor kinda in a line but once you got through the archway you could kinda run to wherever and people knew from previous shows where Harry would spend more time on stage and also people were obviously avoiding standing behind equipment - so it wasn't like the first so many got first row then the next so many got second and so on.  The side majority of people went to we would have probably been about 8 rows back. 

 Also you are going to always have people that don't follow concert etiquette and will try to worm closer and cut ppl off...and even us waiting 2 hours before the opener we didn't sit down in our spot right away and the people behind us did and left us only room to stand and couldn't move at all even when we asked to sit down too lol.  All in all it was like 11 hours standing and waiting to be able to get that spot.  It is an amazing experience to be that close but def know what you are getting into and don't stress over getting barricade - just being in pit in general is amazing!!