Where do I find edits to proofread? I would like to proofread edits submitted by other people. I'm not sure whether or not it's limited by reputation.
Edits suggested by users having less than 2000 reputation are reviewed in the Suggested Edits Review Queue, which can be found at this location.
However, before you can start reviewing here, you will have to earn the associated privilege. As can be read here, you need 2000 reputation to start doing this.
So while having less than 2000 rep, you suggest edits, and after that, you can edit immediately, and review others' suggestions.