If you find yourself unable to read the source material, instead of giving up try engaging with more modern versions of the source material. There was a post on here by Feed_el_Castro who said

An unfortunate problem with Marxism is that for some reason we expect people to read the original works of the 1800s. We don’t expect this for any other science.

The way we learn physics is not by reading Dirac’s and Newtons and Einstiens theories as they wrote them, but through a systemized breakdown of the cirriculum developed over a century of increasing knowledge in the topic, in which you start with simplified building blocks which you can use to learn the more difficult parts. We also make an effort in designing physics problems which require a certain level of repitition to master and understand.

He then lists comrade Luna Oi's English translations of the Marxist cirriculum in Vietnam. Which I would also recommend