NotAlone
Yes, the way it works is anyone can propose changes changes, and then authorized users can accept those changes after looking at them, or comment on them.
As long as a pull request is made, you're good to go
I don't see any pull requests pending at this time, I'll look at your repo a little later.
I haven't tested this method too much, I may create a step by step guide for it as it requires a bit of understanding of how github and git works and to help avoid to avoid the pitfalls you're discovering.