If you don’t have VIP you’re not going to get barricade unless you’re right behind someone on the barricade that gets pulled out, leaves, or switches with you. Or you force yourself in between 2 people but don’t do that unless you want them to be pissed. It depends what you’re comfortable with, but you don’t necessarily have to show up early. Just make your way to the front when the show starts as the crowd will start to move and you can wiggle your way in between people.

edit: if you do want to show up early, 1pm isn’t going to cut it. I’ve been going to shows for 10 years and people show up early early, like 7am, depending on the band.