@embracemthrhd2, yes - that I what I had been told too :) to pump after 4-6ws because your baby establishes your milk supply and than pump 1-2 a day between feedings. If you are solely pumping you would pump 8x a day meaning 2-3h, for around 20min each breast or 2min after your last drop of milk :)
I had to start pumping thr day i gave birth cause i didnt have enought milk (20min every 2 hours) but they say nit to pump the first 4-6weeks.... anywhere between 2-4 onces is normal ... i think... this is what i have learned....