You Can Ask What a Ritual Means
You do not have to choose between joining silently and rejecting an unfamiliar ceremony. There is another possibility: ask about one part.
“I am interested, but I do not understand yet” is a complete and honest beginning.
You might recognise the songs at a family temple but not their meaning. You might enjoy volunteering while remaining unsure about a teaching. Those are different kinds of participation, not evidence that you are a fraud. Be clear about what you know, what you are exploring and which commitments you have actually made.
A community can welcome that honesty while still teaching carefully. It need not remove every challenging idea or tell you that all opinions are equally well founded. It can explain, offer sources and give you time to think.
The Kālāma Sutta's invitation to examine conduct and consequences is more demanding than accepting whatever feels comfortable. Curiosity involves listening and being willing to revise a view, as well as asking questions. [AN 3.65]
For a society leader, a useful invitation is: “You may ask, observe or pass on this activity.” Follow it with meaningful explanations and a reliable way to seek help. Inclusion becomes practical when people do not have to conceal uncertainty to keep their place.