Depends how big are your boobs and how much cleavage are you willing to show? If you can at least make a b cup look like a legit d with a pushup bra on you'd at least be able to wrangle 50 within a week id say. You dont even really need a personality just at least be a 6/10 with a nice rack and you'll be set.
If you're a guy then lol anytime between 1 day and never. Depends if there's an audience for a diamond 5 shaco player. The biggest things are at least be good at the game or if you're not, be entertaining. Pick a slot when not too many big viewer streams are on and get your name out there, you'll find out soon enough if you're an interesting watch or not.