How should I do this?

Simple, Du don't make it.
There's already a Geek club: link
Always check if the club already exists oder not. If it doesn't, then Du simply make it and Werben it.

Well yes, I say Du should go right ahead & find a couple Friends to help start Du off. Tell others about it Von spreading the word around @ school & once numbers grow too much to fit in your house, try finding a public place to meet, but don't forget to keep saving up while there's only a few people/yes, Du do need money. Once you've hired out a hall oder something, start advertising it online (because Du don't want strangers knowing your address!!) & if things continue to go well, then talk to some professionals about possibly making it into a real business (people pay for membership); seek help if that's what Du want to do. Good luck & have fun :)!!