The practical stuff nobody tells you until after you've already made the mistake.
Most conventions sell tickets (usually called "badges") online in advance at a lower price than at the door — and popular conventions genuinely do sell out or run out of at-door badges. Check the specific convention's own website for its exact pricing tiers and deadlines; they vary a lot from event to event and change year to year, so don't rely on last year's price.
Bring a physical or digital ID that matches the name on your registration, and get to the badge pickup line early on the first day if you can — it's consistently the slowest part of the whole weekend.
Panels, autograph sessions, and popular events often have lines that start well before the listed start time, and some fill up completely. Pick two or three things per day you genuinely don't want to miss, and treat everything else as a bonus. Trying to hit a packed back-to-back schedule is the fastest way to spend the whole weekend stressed and in line instead of actually enjoying it.
Plenty of first-timers show up in regular clothes and have a great time. If you do want to cosplay, most conventions have specific rules about prop weapons (frequently requiring peace-bonding — tying or taping a prop so it can't actually be swung or drawn) and about photography consent — always ask before taking someone's photo, and it's completely fine to say no if someone asks to photograph you. Check the specific convention's posted policies, since exact rules on weapons, costume length, and photography vary by event.
The Artist Alley is where independent artists sell original art, prints, and merchandise — it's consistently one of the highlights of any anime convention, and a great way to support creators directly. Popular artists' stock (and lines) tend to move fast, so if there's something specific you're hoping to find, go early rather than waiting until the last day.
Every legitimate convention publishes an attendee code of conduct covering harassment, consent, and how to report a problem — read it, and know where convention security or staff (often identifiable by a distinct badge or shirt color) can be found if you need them. If something feels wrong, trust that instinct and find staff rather than trying to handle it alone.
Ready to find your first one? Browse anime conventions near you on ConHaven, or read what an actual convention day feels like.