FTM, what combination of pumping nursing and formula?

Hi! FTM - trying to figure out the best course of action cause I can’t exclusively nurse anymore - it’s driving me mad!

LO is 7 wks. I’m trying to figure out how ppl pump vs nurse.

Right now, I do 1 bottle at 7pm. And one if I need to go out in the day time. I think doing one at 4am would be good because he is so hard to nurse half asleep.

But I’m also thinking I want to go back to work at 3 months and that would mean that I pump 9-5…leaving only one or two sessions of nursing a day? Has anyone had experience of that working or do babies get to used to the bottle to nurse only for 2 sessions a day? I can do more nursing sessions on the weekends.