If you want a comprehensive resource then An Anarchist FAQ has an entire section dedicated to state socialism https://anarchistfaq.org/afaq/sectionH.html.
Some your questions are answered there like:
- H.1.4 Do anarchists have "absolutely no idea" of what to put in place of the state?
- H.3.7 What is wrong with the Marxist theory of the state?
And if you want some more examples of an anarchist society then Section I is dedicated to that.
Although It is worth noting that there are a lot of different anarchists and the FAQ does not speak for all of them. I just think it manages to get the basics across very well.