There are lots of people with very precise ideas about how to execute it, and most of these people are not widely studied. The communist states that arose in the 20th century are all representatives of a narrow slice of authoritarian statist communism called Marxism-Leninism. If you want to learn about other ways of organizing a communist society, you can read the writings of other figures like Bakunin, Kropotkin, Pannekoek, Öcalan, etc.