You can walk into any dungeon regardless of level or item level (except needing to be 15 to start the first ones), so you're fine. You cannot queue up for them until you're the right level and item level.
Originally Posted by Populaire
If he was a real man, he should be walking around in a loincloth. And at the end of a long day, he can also drag his woman to his cave where they'll do the boomboom in front of a fire.