Libertarian used to be a polite word for anarchist, it was a contrast to authoritarian. Libertarian socialists still see themselves as part of a historical tradition as an alternative to authoritarian socialists, though that's more European than American. Then there was a political project of European and American conservatives to redefine libertarians to mean conservatives who believed in strong property rights and a weak state.
Anarchism is a broad ideology against authority. Anarchists are against private property rights because if there is private property, there must be an authority to enforce those rights. Instead, anarchists point to pre-civilization methods of carving out individual spaces from the commons so that people can live without having to "make a living."
There's been a massive propaganda push by governments and state powers to define anarchist as "bomb-thrower," or to try and make anarchist ideas seem ridiculous, but anarchists are extremely invested in people recognizing themselves as moral agents invested in communal good while maintaining individuality. if you're interested in anarchist ideas, try reading non-fiction like David Graeber, or fiction like Ursula K LeGuin, or speeches by Emma Goldman. Don't let people on social media's knee-jerk reaction against anarchism turn you off. Even if you end up not being an anarchist, you can at least engage with the ideas and maybe find some stuff that resonates with you.
Reading anything without the help of AI will help you become a better writer because you'll learn new ways of using words and sentences and syntax in a way that people write naturally. It seems weird to focus on Marxism, but if that's what gets you reading, go for it.