Marxism, reading theory brought me to Historical and Dialectical Materialism, which also brought me to researching the foundations that led up to Marxism that Marx built off of.
Haven't read Hegel proper, if your goal is to understand Marxism then Elementary Principles of Philosophy is my recommendation. It goes over Idealism, Dialectics, Materialism, and then how they came to form Dialectical and Historical Materialism.