Need tips on exclusively pumping

I really need the ins and out of pumping exclusively. Like once I pump, do I store it all in the freezer or do I leave some out for the next feeding? How much milk should go into one bag? I produce about 10 ounces a pump session, how should I split that up? Also, when baby is ready for a bottle do I have to unthaw a milk from the freezer every single time?? I just need help overall lol. I'm struggling.