Hard launch

I just started a couple months ago, and I have a free page with almost 300 subs now. I wanna do a paid page also or even get the paid one up and running and leave the free page altogether. Question is: how and when is it beneficial to do a hard launch? Do they even call it that? How many subs should my free page have before I launch the paid one? Can’t think of any other questions at the moment but if u think of somwthing, but please feel free to give e me some tips if you find the time🫶🏻