As per the Review Queues introduction page, "First Posts" and "Late Answers" can be earned at 2,000 reputation.
But I can access those review queues, after reached 500 reputation in all the Stack Exchange sites.
Also in the same page, I see the following information:
Once you have achieved 2,000 reputation, you have access to the first set of Review queues ...
That is not correct, after reached 500 reputation we can access the review queues.