When I started to read books I struggle a lot , because reading in English has so many unfamiliar words, and when I used to it everyday it's easier to understand what its meaning .The first step to do to learn it quickly just take note the unfamiliar words and find the meaning of it in the dictionary.
It is understandable to struggle because most of us is not using English language to our daily conversation,so just keep going and read more textbooks everyday. GOD BLESS you all.