The most fun parts of religion are the camaraderie and intricate, abstracted rituals that used to serve one purpose but now serve a different, often symbolic one.
So lots of that. Spaced out throughout the year as to give followers a way of marking the passing of time and a reason to call out of work at regular intervals.
Oh, let’s toss in a lil religious specific language to aid as a group identifier and how about some arbitrary rules/guidelines that aren’t strictly enforced and vary by region but give those rules loving peoples something to grab onto.
Oh oh oh and unique cuisine! Food goods made in certain ways at certain times, with some slight variation so followers could have techniques and recipes to share and mild, inconsequential things to disagree and hold frivolous, memetic arguments about.
The details don’t really matter all that much, as long as it can serve as a way to find community and camaraderie in new places, reinforce solidarity with your fellow humans, and give some rituals for timekeeping and distraction from modern life.
I’d like to think these are just some of the universal things of what makes a community fulfilling and fun, as I was mostly trying to abstract some of my favorite things about being Jewish from the faith component.
Ah gotta get Festivus on the calendar! I like the rules idea too, maybe a few super random things just to be quirky.
For some people, it’s important to have rules!! Of course you need the standard social construct rules, but the less necessary ones are important too. I think they give structure and consistency to people, so even if they’re arbitrary, it fulfils that need and as long as isn’t disruptive to society, I don’t see the harm. Plus, knowing someone also follows the same rules, rituals and holidays you do gives you instant rapport with them, so it aids in building a sense of community. Polite people outside of the new religion will also be curious and interested in hearing about these rules/rituals and whatever reasoning could uphold them, and the followers likely will enjoy explaining them, so this helps them build friendships outside of the religious group as well.
Tho it’s crucial that others aren’t ostracized for not following the more arbitrary ones and that those that do follow them don’t feel any actionable feelings of superior devotion or what-not. I think you can ostracize people who violate rules that relate to already well established social constructs (theft, murder, etc), but not the more frivolous restrictions and behavioral requirements we’d invent here.