How to start socializing business
Currently (in the U.S.), you can incorporate an organization as a Not-For-Profit, a Corporation, an LLC, or one of a few other types of private for-profit corporations (specifics depend on the state).
If you incorporate, your bylaws dictate the governing structure, so worker-owned companies can be created and some do exist.
But my state has no formal legal apparatus for forming a worker-owned company or a community owned company, and I want one.
I want the official legal framework, along with administrative support (which private businesses and non-profits have). Then once some worker-owned and community-owned companies form, the government can give grants and contracts to these companies, which could encourage the growth of democratically-owned businesses.
It doesn't require tearing down capitalism, forcing any businesses to close or change their governing structure, and it isn't state-owned either. It just creates a new option that can be freely chosen by those seeking to start businesses.
I would support some city-owned and state-owned businesses (but not typically monopolies, except for some utilities like water or energy delivery, meaning city & state-owned firms would have to compete on the market), but that is another topic entirely.
Myy goal is to bring forward more socialism (as-in democratically-owned means of production), but in a practical and approachable way. If socializing goes well over the next decade or two, we could consider moving toward more heavy-handed socialization, but I think it's not necessary or realistic to jump to that right away. And hell, if socializing goes badly, we might reconsider.