Age to be done having kids

What age did you want to be done having kids by? How many did you/do you have? What ages did you have them? What age gaps do you have? I’m 21 and was thinking to start trying around 24 or 25 after we’ve been married for a few years but I want 3-4 kids and I also have PCOS so that would make it difficult but I’m also not sure if having kids into my 30’s is too late?

Edit: I am in a committed relationship and plan to get married this year, that’s what has me thinking about this.