Tbh your intended purpose is quite admirable. I think your being too hard on yourself. Community building is not easy. A political community can often be even more difficult.
I would say what you have is a learning experience. Which with sharing as you have can help with future projects for everyone involved.
Already some great discussions occuring already.
As there is often very diverse opposing view points. One idea is to create groups. Each group in differing ideas. Each forms a group of similar minded ppl. There each group chooses a leader/presenter. They brainstorm and refine their idea proposal exploring pros and cons of the idea
Once each side is ready or maybe on a scheduled frequency the presenters report on their groups progress on the idea. Some one so to speak neutral acts as a chair to keep both sides in track. You might have more than 2. Using category and group settings you can create a fairly diverse structured environment. But it needs a group to support as going alone will risk burnout.