If you try to understand the book as the text approaches you word by word, you will get lost. It took me like 100 pages to realize that. But if you read the book like a poem–which it is; an epic poem–by looking beyond the mere words, you will start to understand it and see its beauty. Instead of being caught up in understanding the book word by word, look more toward the image that is being created. The energy behind each line of text; focus more on the line of text rather than the words and clauses that the line consists of. From there, you will see more than you ever could if you went by word by word. You eyes will still pass over each word but you will no longer become inundated and fatigued, once you start focusing instead on the lines and develop the deeper image and meaning that Milton is conveying.
There are online versions of the book, as well as audio versions of the book.
If reading is still too hard, check out the audio version, but either way this book is a must. Let me know once you finish (write on my wall or send me a message or whatever).