This proposal has 19 users and 13 questions. Ideally, everyone would help, but I know a lot of people think it's a good idea but don't really know about content creation. However, more dedicated users like warren tend to ask only two questions. Compared to Amusement Rides And Attractions, which questions:followers ratio is more than one, we're doing well on the followers side but not on the question side. How can we get people to ask more questions? Proposal: Content Creation
What was the pre-existing community you had when you made the proposal? You had to give a URL to its website in order to make this proposal.
You are expected to have a pre-existing community that can do things like ask example questions. All you need is 9 people in that community to ask 5 questions each, to reach 40 questions. The hard part will be to get upvotes on each of them. For this you will need a community of about 100 people, because people from outside your community will be downvoting questions too.
If you check the Commitment phase of the Materials Modeling proposal you will see that 144 people joined based on my referral link (and more than half of these people I already knew before I made the proposal, because there was a pre-existing community).
You might want to start a pre-existing community before making a proposal here. The "Materials Modeling Stack Exchange" Facebook group had about 1500 members when we had only 200 committers to the proposal. You will likely need 100-200 pre-existing supporters who love the idea, in order to get your site into Beta.
I'm sorry that SE didn't make this clear to people proposing sites. I wish it had been made clear to me.
One way we could do this is by getting more people involved. Specifically, perhaps we could reach out to content-creators who might be interested in a community like this. By having more people, we will more heads that can help think up questions. And hey, it would also help us build our base at the same time.
Rhetorical question: Why do you need others to participate any more? If there is no interest, if people just don't have questions to ask, then there is probably just no need for this proposed site. That's the most honest feedback you can get.
I don't see any useful purpose in pushing a proposal artificially.