Assuming you’re genuinely asking, Communism isn’t so much a “status” as it is a strategy for reaching the famous “Stateless, Classless, Moneyless society” it is often shorthanded as. It involves smashing the existing state, and replacing it with a state-as-non-state, ie a form designed to wither away once global class antagonisms are made redundant.

Economically, it is centered around collectivization of the Means of Production, Centralization, and Central Planning.

That sounds like nonsense without reading theory, unfortunately, but if you want something short, Marx’s Critique of the Gotha Programme goes over what a transition to Communism may look like. Lenin’s The State and Revolution also goes over what that looks like, it’s roughly a quarter Marx and Engels quotes and he analyzes how Marx and Engels changed their views after the Paris Commune.