I think the first paragraph following the header should explain what the process is.  Start with the fact that it's fully open on GitHub and includes:
 
- functional and design suggestions 
- code review, including test coverage
- merge and release

(or whatever is right)

I don't think it matters much from the developer's perspective that community leaders are assigning themselves unless, I suppose, no one actually steps up to do it.  Also, I'm not sure why "completion" is mentioned, since the clause which follows is both necessary and sufficient to explain.

Maybe something like: "Once you have submitted your pull request, a community leader will help you navigate the full review process." (Assuming it has been explained above.)  "Of course, any member of the community or team is available to help with questions throughout."