I don’t know a lot about what’s “okay,” but since you are a non-Catholic, I hope you would treat it with the respect one should give any religious article which has its base in any faith. I’m an elementary school teacher, and rosary necklaces are a current fad, filtering into the schools as a tangent to the gang activity in the neighborhoods. When one of my students wears a rosary, I take them aside, compliment them on its beauty, and ask them if they know what it means. The answer is invariably “no,” so I gently tell them that it has very special meaning in my church, that every part of the rosary is associated with a prayer, and that I hope they will treat their rosary with the utmost of respect. I hope the same goes for you. If you perform an internet search on the rosary, you will find many sites telling you how it is used. Also, there are MP3 programs and android applications which can be used to walk a person through reciting the rosary, but please don’t do so in vain.