FTM: Giving Baby Bottle for First Time

First time mom here. I want to start pumping and giving my 2 month old at least 1 bottle of breastmilk a day as I will be heading back to work in a couple of months and I heard it’s a harder transition if I wait longer.

Anyway, I received some bottles at our baby shower. Can I just use any bottle to start him off on? Also how much breastmilk do I put in the bottle to feed him?

I know these questions may seem pretty obvious but I’ve never fed him a bottle so I just really have no idea how to get started.

Help please 🙂