Use snap lock bags and freeze about 50 mls in each to begin with, lay them flat to freeze. They defrost super quick and you can pick how many you want. Most bf bubs don't drink an awful lot, so you may only need 2 at the moment.

I'd wait until you have established your routine and supply. Sometimes throwing pumping into the mix can stir it up to much. Introducing a bottle to young also runs the risk of nipple confusion, its far easier to drink from a bottle and can create some confusion as to how they are meant to get their milk. Maybe explain to DH that the most important thing at the moment is sorting all this out and then you can move onto ebm at a couple of months for him to have a go.

Easiest way I found to express was to pump on the opposite side to the girls while they fed. It helps with letdown and flow and I usually got more this way. When you supply is established it takes awhile to get a good pumping routine happening, to begin with you will get smaller amounts, until your b00bies adjust to the increased demand. Just remember that if you pump each day, when you stop you will have an over supply, which is a risk for mastitis, so you have to also ease out of pumping as well.