yeah, capital is like reading a brick and its not unintentional. Its supposed to be inaccessible so plebs just read the communist manifesto and think thats it imo.
Hegel is less political than marx but all marx does it take what looks like a hegelian foundation and follow that but is, in reality, flawed from the beginning.
Youre kinda putting the cart before the horse here because as >>5937324
points out, a lot of major philosophers had huge impact on the later ones and you cant really start at the 19th century. A lot also came as a reaction against others (kant did) so its a little silly to read them without first knowing what theyre reacting to.
Basically, its a good idea to start at the beginning and work forwards but it is a long road. The early ones are more fun though; a lot of the 18th and 19th century is so dry and verbose.