Rather than putting the burden on experienced users to check the first edit from new users, it may be more useful to introduce functionality similar to that provided by git, which would make it much easier to track and correct the mistakes.

Also, a user’s first edit may not be the one that causes trouble, the first edit may be extremely simple, it could be later on as they’re starting to get a bit of confidence that they make more extensive and damaging changes.

Disclaimer: As a beginner I fit right in to this category - knowing just enough to be dangerous.