I am not an ML but I think your best bet is getting them into the reading early. We don't need more youtube & tiktok communists regurgitating things they heard by people who haven't done the reading themselves.
The Principles of Communism is a good start. After that, The ABC of Communism by Bukharin and Preobrazhensky I find to be a highly undervalued text, especially since Lenin occasionally references it. Beyond that, Economic & Philosophic Manuscripts of 1844.
At that point they can really just dig into whatever. If they are interested in the content they can look for explanations when they don't understand.