I guess I don't understand the whole organised religion thing. Any religious situation that demands you behave a certain way and perform a certain way is problematic for me. Case in point, the demand you tithe. I question an organisation that would demand you do anything that is difficult or detrimental to you and giving money you do not have is quite bothersome. If anything they ought to be offering you assistance instead of the other way around. Just my two cents here.

Regardless though, you attend because something about doing so does in fact provide comfort and if that is the case then I encourage you to embrace it. However, if you find that it is not so encouraging a situation you might have to re-evaluate things (I have no recommendation here nor tell you what is correct).

At the very least, you should feel the freedom to talk to your advisor about your concerns and difficulties. Be clear that some of the requirements are frankly beyond your capabilities. If they cannot come to terms with your spiritual needs are you in a position to get another?