We all want to sound more "natural" in any 2nd language we speak. Not using the Articles correctly will ensure that you will not sound natural.
The best place to start is the use of the 3 basic Articles, A, An and The. The right application of these ensures that the message is clear, the quantity is set and the "want" is established.
You will sound more natural when you master the use of these 3 little words.
Hand me book. (not correct)
Hand me a book. (meaning any book)
Hand me the book. (meaning a specific book)