It would help if third parties would do something other than put a candidate up for President every 4 years, fail, and then disappear for the next 4 years. That’s a waste of everyone’s time, money, effort, and votes. Parties that do this should be looked on with suspicion.
Get people into city councils, school boards, and county comptroller. Work up to state level government. There is tons of good to be done at that level of government–in many ways, far more than the White House could ever do.