Pumping advice

Hi. I’m 3wks PP and a FTM. I started pumping three days ago. I’ve been pumping twice. Once in the middle of the night and again first thing in the morning. I’ve been pumping right after I nurse my baby. I also use the Haakaa in the middle of the night. I can get about 0.5oz with the Haakaa and about 1.45oz with pumping. I only pump for 10 mins, which is what was advised by my doctor.

I really want to building a good freezer supply so I can have some freedom back and sleep through at least one night a week.

How much should I expect to pump per session? Should I expect to get more per session with time? Any tips on increasing output?

Thanks!