[tehjoker]

Like others have said, "The Communist Manifesto" is the easiest entry point. My copy also has "The Eighteenth Brumaire of Louis Bonaparte" which some say is the work most descriptive of the US today. "The State and Revolution" by Lenin is a relatively easy and enlightening read as he talks about the nature of the capitalist state, the police, and other topics. "Reform or Revolution" by Rosa Luxemburg is also clarifying as it talks about why reformists have lost the thread. However, there are also many many many leftist podcasts you can listen to that can be easier to digest and will get you the basics, so that way when you read the original works later you have a baseline of understanding.

Capital is a doorstop, but I have heard that past chapter one which talks about the labor theory of value, the reading is much more breezy.

However, while some of these books are dense, even rural peasants have been able to read and metabolize these books, so don't despair!