I've actually put a lot of thought into this lately, what with the most recent schism in The Satanic Temple.

The seven tenets are great. I'd keep those.

I would start with the understanding that it was an atheistic religion, and I would treat it as such. I would write a constitution, and a charter, and any group that agrees with and meets the requirements laid out in the constitution should be allowed to affiliate themselves. It should be organized as a non-profit.

I like the way that TST's ministry program worked before Doug threw most of the ministers out. I'd steal that. I would amend the process slightly though; I'd say that any person with a diagnosed personality disorder would not be eligible for ministerial positions, as narcissists, people with borderline personality disorder, etc., should not ever be in leadership positions. I would say that any person that successfully completes the ministerial program should be eligible to be a leader of a congregation, and people that have not passed would not be.

I would propose that the congregations send representatives to a national (or international) convention where they decide what the organization's position should be on issues--I believe that it takes two majority votes in the SBC over a period of four (?) years for major doctrinal changes, or changes to the constitution--and those representatives would also select board members, who would in turn select a president. (I'd have terms of board members be offset so that there was never a period where a large percentage of the board was turning over.) Fundamentally, the church should be run by the people, and should be serving the congregants, rather than the congregants serving the organization.

I believe that yes, members and congregations should be paying in to the national organization, but no person within the organization should be getting paid for their work. I don't care if it's a collection, a set amount per person per week, or what; operating a religion requires funding. That said, the only compensation to anyone within the org should be minimal travel expenses for people that need to travel for their position; otherwise, it should be entirely a lay ministry. (Yes, that would be a financial hardship for some ministers, but I'd rather see that than have people seeking leadership for the financial benefit.) Finances should be fully transparent, and visible to all members, so that everyone can see where money is coming in from, and where money is going.

I also like the Mormon model of fully engaging all members. As long as it's not onerous, I think that this can help individuals feel seen and heard, and also keep them feeling like a part of community. I would do things like have each members selected in turn to deliver brief biweekly sermons, with sources, and then have members in each congregation engage in a roundtable discussion about the sermon. You would want to have the possibility of sub-groups within each congregation so that different needs of individual members could be taken care of.

I made some notes somewhere, but I'm not sure where they are right now.

EDITS:

Members should have to pay, because the operations of a religion cost money. You have to have a (stable) place to meet, you need to pay for power, and yes, you need to pay for attorneys and accountants. It should definitely be strictly a lay ministry though, with leaders only being compensated for their expenses, not time.

The issue with The Satanic Temple now is that Doug Mesner (aka Lucien Greaves) and Cevin Soling (aka Malcolm Jarry) outright own all the legal entities that make up TST. There is no process that can replace them; they can remove any person or group that they don't like. They have the ultimate power to make all the rules, and they are entirely above them. That means that, despite TST claiming to believe in freedom from tyranny, it's fundamentally an authoritarian organization rather than a democratic one. For all of it's many, MANY other faults, the Southern Baptist Convention is democratic, and I think that's a quality worth emulating.