As far as I understand, Anarchism doesn't mean no rules, it means no rulers. No hierarchy of people.
The rules would be set up in such a way to actively discourage individual accumulation of power as much as possible. But a system like that could still have rules, just enforced collectively instead of power being parceled out to individuals. I think there are a lot of practical ways you can try to reduce power accumulation, like term limits is a very obvious example that is a concept we are familiar with. Or like ways of reducing wealth inequality can also be seen as a way of trying to reduce hierarchy.
I don't know all the theory, I honestly feel like that kinda shit isn't always the most useful anyways. But there are obvious things we can do now to reduce hierarchy and they seem like things that would be good. Having an ideological stance that hierarchy is bad, and we should reduce it as much as possible.. that's Anarchism.