Oh it's the PCO person again. Just stop with this, it's embarrassing. You can't just claim PCO is the only marxist party in Brasil, specially when PCO is so fucked up.
Here's some examples:
Here's PCO being both ableist and lgbtphobic on Twitter by calling you the r-word for using neutral pronouns. (It's full of right-wingers agreeing with the post in the comments)
PCO defending YouTuber Monark's "freedom of speech" for saying that Brasil should have a Nazi party.
And here's another one where they say they are against banning fascist parties.
Left-wing and marxist my ass. What a joke.
You could start with communist content on YouTube. That tends to be more easily digestible and eases you into reading theory later on.
I can recommend channels like Second Thought, Yugopnik, Hakim, revolutionaryth0t and Ian Neves/História Pública (you'll need to use subtitles for this one if you don't speak portuguese).