How do you make a cult… as a player?

So My character is a warlock, given his magic by a Great Old One. A idea that my DM is totally down for, is how would we make a cult? specifically one made by a warlock, currently we’re in a normal city and it seems this will be our normal hub for the campaign, so I’m curious on what are good hooks for people to get into a cult? I know about indoctrinating those who have no shelter and are desperate, but just a general base, things to tempt them further as my knowledge on the subject is very small so any advice will help!

Apologizes if somethings are poorly worded.