I'd really like GitHub to have the option of open sourcing your work but both being able to turn off pull request and be able to limit PRs and issues to trusted

I'd really like GitHub to have the option of open sourcing your work but both being able to turn off pull request and be able to limit PRs and issues to trusted contributors. Open source / closed contribution on an individual level. I like the project I'm working on now, but if I release it publicly I don't want to deal with 98% of the possible users. I'm mostly worried about the idea that the itch I want to scratch will turn out to be popular, because open source is mostly horrible.