You might not need them. I mean I did. Whoa, I really did. But I do know of people whose breasts just seemed to never go crazy like mine did.
So don't overinvest initially.
But have an idea - good to do your research and maybe have one pair and then get more if/when you need them.
Yes I would only get a few - I probably only really needed for about two weeks - after that I had occasional leaks but I really didn't like any of the ones I had (a few Avent and a couple of bamboo of some sort) - so stopped wearing them - and just lived with the leak (there wasn't anything wrong with the ones I had - it was just I didn't like the feel of something extra in my bra (but I don't do well with nail varnish, or wearing rings, so maybe I am a bit strange))