>>1682412Depending on where you are and how strongly you feel about your non-belief I'd try either searching for secular organizations similar to churches that are explicitly for non-believers, like Sunday Assembly, or if that doesn't appeal to you or is not an option in your area look for an active church with a good number of people around your age that doesn't have a hard-line fundie leaning and isn't likely to turn you away / burn you at the stake if it somehow comes out that you're not even a believer.
some examples that might help
https://www.uua.org/beliefs/what-we-believe/beliefs/atheist-agnostichttps://en.wikipedia.org/wiki/Sunday_Assembly(I have no relationship to either of these I've just heard about them)