I am sorry I did not know how to see this question so it would seem to have taken me a long time to answer it. But her is my answer.
First. Anytime you are going to make a life changing decision like joining a church you should investigate and learn enough to make a good choice.
Second. Turn to God for answers. If you believe in a God then you know he must love you and want for you his very best. He will answer you if you ask with your heart.
Third. Be prepared to follow the answer what ever it might be.
Forth. Stay with it till the end. Never turn your back on what God has given you by way of an answer.
That is what I would say. There are other reasons such as the LDS church has great programs for the Youth, for the Women, fantastic social interactions in the ward family. But that is not why one should join. One should do it because they believe it is truly the Church of Jesus Christ restored in these the Latter Days.
Thank you for asking. Would love any dialog you might give.