Do I need to pump much?

Bl

So I plan on breastfeeding for 1 year. I want to pump so my husband can some time feed him during the night because ugh it can get exhausting for me, and also have some milk to freeze to have in case we need it. I’m mostly nursing will I not have enough milk to pump? At the moment I’m only pumping 1oz. That’s after a session of feeding baby. I’m almost 6 weeks PP I feel like I should be pumping a lot more even after a session of nursing.