I am not in a religion currently but I have been as an atheist in the past. I think non theistic religious practices can be about cultivating certain traits and exploring deeper connections to self, others, and the world. It can also provide a community of like minded people. I think many rituals have psychological value aside from any supernatural events or beings existing as well. Depending on the situation they help us to connect more deeply with self, environment, or others, impart a sense of identity, reaffirm commitments and values, help us negotiate change in our lives, commemorate important life transitions, and generate positive memories. I don't think any supernatural beliefs are necessary at all to find some value in these things. There are though also atheists who do have supernatural or metaphysical beliefs, just not god beliefs. All atheism means is lack of belief in deities. Not all want to completely withdraw from all established metaphysical practices. It most certainly doesn't mean a rejection of morality for most atheists although they may disagree with some concepts of morality set forth by different religious beliefs. Then again so do various religions disagree with each other on what is moral behavior.