Breastfeeding June Mommies

Autchalo • 30yrs old. Louisiana! Mother to 29week preemie who is now 6yrs old! Pregnant with #2 #EDD is June4
It's been almost 7years since I breastfed or pump! I have been doing a lot of research to refresh myself on breastfeeding! I exclusively pumped as my daughter had a 2 month nicu stay. I do however want her to latch but maybe for the first 4 weeks. I will be a returning working mother of two and want to get on an organized breast pumping schedule! Can any of you give some suggestions! Also I worked out a lot before pregnancy and will be returning once I'm cleared. I want to know if working out will affect my supply?