The Church of Solarity™ started out as a meme cult (a cult that worships memes), but has since become a cult meme (a cult that is a meme). It used to be its own thing, but now it’s the main sect of a bigger cult meme, the Church of Polytheism™.
No, it is not Hetalia, surprisingly enough, considering this is me we’re talking about. It’s an original thing I’ve been putting together over the last few weeks with some people from Discord. All the characters featured in the Church of Polytheism were entirely created by myself and the rest of the CoP lore planning committee on Discord.
The biggest and probably best way to get included is by joining the CoP Discord server (joining the server requires having or setting up a Discord account; Discord is an entirely free online chat client that you can either download or access online), which I will send you an invite to if you pm either myself or the official CoP Tumblr blog. Speaking of the Tumblr, you can also be included by participating in CoP events and such on Tumblr. The blog is @church-of-polytheism.
Either message/ask me, or message/ask the Tumblr if you have any further questions. I am more than happy to ramble about my cult meme! :3