I nursed ds3 15 months and worked 45 hrs a week. I got a medela Pisa and pumped at work..I tried to shoot for every four hours.
When I was off work , I only nursed. No bottles, no pacis let baby comfort nurse. I also nursed throughout the night on demand.
Dont be tempted to skip pumping sessions or supplement with formula. It will affect your supply.
You are going to need to try a few bottles to see which works for your baby. We used avent naturals. Check the box before purchase. Make sure it says breast like/ bf compatible. I waited about two weeks to introduce bottle and had ds father give it to him. No pacifiers.. No regular nipple bottles.