When to be there?

So I'm going to the Portland show on Sunday and I'm kind of new to concerts, this will be only the second time I've been on the floor at a concert, the last one being twenty one pilots. And for that show there was a lot of fan made lines and you had to show up hours and hours in advance to be at the front, so I'm wondering if anyone could tell me if conan gray concerts are the same and around what time I should show up if I want to be barrier? Thank you!!