Colostrum harvesting?

At what week of pregnancy can you start collecting colostrum. I'm currently 35 weeks and I'm leaking a lot and don't want all the gold liquid going to waste.

I'm hoping I get the go ahead for 36 weeks but I'm new to this, what's the best product's to use? So I use a Hakka, breast pump or hand express?

Looking for as much information as possible.

TIA