How do you plan to vet experts?
Take a look at Lyft’s post-ride survey. Rate your ride, plus a set of chips that let people express what stood out about the driver, plus a comment field. Very simple & quick to complete.
Otherwise your platform is really a way for random people to get money (nothing wrong with that) while the actual maintainers are busy writing code, reviewing tickets, etc.
I know monetizing open source is terribly difficult so I don't want to sound too negative.
Ideally, this is the plan.