Guyton feels like a block of text,pls help.

fresher here,been trying to read guyton for 2 months now. have "completed" cell,blood unit and halfway through with cardiac unit but i feel like all i read is a block of text thats 40% inside my brain and the rest vanishes the moment my eyes peep off of it. and the 40% seems like an overview of the chapter after some time... could i get an approach to physiology? ive heard of doing 2 books together but i don't understand how..read one chapter from two sources?? will i even have the time to do anything else if i am focused on reading two 1000 page books 😅😅

I've tried video lectures from PW and they're pretty cool, but the thing sir taught was only somewhat matching with guyton so i feel like the notes i made were better in that sense.

Please help me out,ive already searched up the subreddit for this particular question and I couldn't sleep thinking about it😅 any insight is helpful.