I think you're putting the cart before the horse. These types of things often develop out of need or emerge organically within a group.
The main problem with doing too much from the start is that the process of defining the governance model of the organization is part of creating the organization. If you want to find people who want to be involved in something like this, it's likely that they want to be involved in the definition of the organization itself, not just part of the building of the outcome of the defined organization.
When building a community, which is effectively what you are doing here, a sense of ownership drives motivation and passion. Try to find others who would share your sense of passions around this and define the structure with them.
The main problem with doing too much from the start is that the process of defining the governance model of the organization is part of creating the organization. If you want to find people who want to be involved in something like this, it's likely that they want to be involved in the definition of the organization itself, not just part of the building of the outcome of the defined organization.
When building a community, which is effectively what you are doing here, a sense of ownership drives motivation and passion. Try to find others who would share your sense of passions around this and define the structure with them.