Here’s an unpopular opinion for you specifically; Doing any of that will be a waste of time and not fix any of the problems you lay out. You’d have much better results by doing the work at the local level influencing the democratic party. You think fighting the corporate elite is the problem, but it’s not. Third Parties have no organizational structure, no real test ideas, and often are just made up of failed Republicans or far-left individuals that have no idea or interest in governing. They are little more than organizations designed to sell books about how perfect their ideas that have never been realistically challenged are.