That sounds lovely, but I think you're getting a bit ahead of yourself. They haven't actually won any concessions or really accomplished anything yet; they haven't even demonstrated a reasonably successful walkout yet (we'll see whether they can manage that on the day of). For what it's worth, though, I hope your optimism is justified.

Unions get a large number of legal protections that aren't available otherwise.

No, we need them more than we used to.

Back before the National Labor Relations Board unions were unregulated and collective action was unprotected. Unions were more like activist groups (think if BLM had a leadership structure and memberships). During strikes unions had to build solidarity and convince every worker to join. Strikers had to physically prevent scabs from entering the workplace, often with violence. Now it is simply illegal to scab. With today’s militarized police there is no way we could return to the era before NLRB and hope for success.

We can, and we should organize outside of unions, but the goal should ultimately be to form a union, and benefit from all the protections you get from having one.

how are you organizing thing online? how do you contact people? how do you choose policy? How do you support people who aren't being paid due to a strike?

What is it you think unions are doing, that they don't need to do now?