I personally it’s not a good thing to pump before the milk kicks in. When you only have a bit on colostrum the first 2-3 days, every bit of it should go into baby’s mouth and not get stuck on the pump parts :) When the milk comes in after that, keep latching on demand first and pump in between those direct feeds. The supply will build, don’t worry:) Also make sure you drink about 3L/day, eat well, sleep well and don’t stress out (severely lowers milk supply). All the best!