The easiest way to start a structured club (i.e. one where people vote for a book, read that book, and repeat) would probably be to look at the first post of existing clubs, e.g. Light Novel Book Club. Do the rules make sense to you? Do you like the nomination template? Maybe look at some other clubs, and then shamelessly mix and match the parts you like and rewrite the parts you don’t like. Post it, and done - you have a club!
Are you not sure there is enough interest or reading material for a club yet? Make an informal thread “Gathering interest for a Sci-Fi Book / Manga Club” with a first post explaining your club idea, your intention to see who is interested, and a call to post Natively links to books/manga the club could read, and then see where that goes.
Rules and processes only apply to already existing clubs, so there’s no way to be in violation of them. It’s your club! The only reason I’m suggesting to look at existing clubs for inspiration is because that way you don’t have to come up with everything yourself.
Anyway, those are my 2 cents on the topic. That’s how I would make a new club here if I ever had the desire to.
