I would recommend a mix of Marxist and anarchist founfational texts, media literacy snd historical texts, and modern summaries and topic-focused books. You can start wherever you'd like, but I usually recommend media literacy and history as they are immediately and widely useful and help open the door to the rest. So maybe an order like this to start:
- Blackshirts and Reds by Michael Parenti
- FAIR.org, the Citations Needed podcast, and Manufacturing Consent / Inventing Reality.
- The Jakarta Method
- A summary text of Marx's Capital or two. Like Heinrich and then Michael Roberts' counterpoints. Eventually, read Capital itself.
- Socialism, Utopian and Scientific and The Conditions of the Working Class by Engels.
- Texts around the October Revolution and contemporaries. Lenin vs. Kautsky, the formation of the Bolsheviks, histories around the timeline, Kropotkin, State and Revolution, Imperialism: the Highest Stage of Capitalism, What is to Be Done
- The basic Soviet canon, like Foundations of Leninism. Histories around the topic, like those of Losurdo.
- Major works by Emma Goldman, David Graeber, Crimethinc, Bookchin.
- Wretched of the Earth by Fanon.
- Pedagogy of the Oppressed by Friere.
- Fanshen and core Mao writings.
- Prison writings of Gramsci.
- Essential works by the French weirdos like Foucault and Debord.
That should set you up for the basics. Not joking - these are the basics that will allow you to communicate with the left and have a grasp of the analyses. There is much, much more to understand, and namely, none of what I've listed teaches how to organize or will make you sufficiently educated on the specific contexts in which we need organization. That is best done by joining an active socialist organization (not Trot and not a cult like Avakian stuff). This list is also low on topics of marginalization and combined struggle, which are important to read (e.g. Leslie Feinberg on trans liberation or du Bois on Pan Africanism), as it really is just the basics.