I was baptized as a Christian in a Southern Baptist church at age 13. I learned good, invaluable moral lessons from Faith, some of which I noted elsewhere on this forum. As a senior in high school I ordered a college catalog from a Seminary in Corpus Christy, TX. and strongly considered attending, but did not.
I am now an atheist. I did a lot of searching, looking at various Faiths including Mormonism, throughout my college years. There are many people of Faith that I admire, but I can not accept an anthropomorphic God or his Son, or an afterlife, as plausible probabilities.
I agree with daylia about the social aspects of organized religions and just about everything else that was stated.
Reasoned responses from people of Faith like WYSIWYG show that religious teaching can be of tremendous help to people dealing with bereavement and many different social issues.
You probably owe it to yourself to accept the fellowship of your new friends. You may feel the joy I once felt when I sang those good old hymnals in a small church resounding with the melodic bliss of spiritual joy.
Good luck with your decision. I would just ask that you and others keep religion out of science and government and science and government out of religion.