Step 1 of the plan is to at least make people aware of the plan.
There’s more options available than expanding the court or whatever. Ultimately, the reigns of power largely rest in Congress and the President. Supreme Court is the moral center, they’re only effective if people believe their judgements to be moral and just. Otherwise, their statements are just fancy words on a piece of obscure paper.
Supreme Court has no ability to write laws or enforce them.