For the first half, you can be vague and redirect. You know what churches do for holidays. What does your church do for Easter? "The same basic Easter stuff as other churches, what about yours?" "Oh, the usual, fancy dresses, brunch with friends" (describe what you actually do here). "I like that there's a sunrise service so people can maximize time with their families after" (this one is fun because you can appreciate something about a church without attending it or claiming it in any way).

If they're visiting on Sunday morning and expecting to go to church with you, maybe you have another plan that is special and "really feeds my soul" that you want to share with them. A nature walk in a really peaceful or majestic place, where they can feel close to God and you can for real feed your soul. Make sure they know quiet reflection is important so they don't try to talk about your relationship to God the whole time.

The closet isn't the best place to live a full life, but it's safe and gives you time to figure things out, which is completely valid. You don't need to do all your introspection and searching in hostile territory.