SAHM switchinf roles with dad

Our daughtet will be 2 in August and our 2nd is due in July. Work has been on and off and hard to find for my husband and i have a good job opportunity for myself. We've discussed me going to work while he stays home with our children, as i would make enough. But i still breastfeed our daughter, though its almost time for her to wean so thats not really a big deal, but i have been the one home with her 24/7. idk if im more worried about the transition for her, myslef, or my husband lol. iplan on breastfeeding our newborn, as. i will have 8 weeks maternity leave, and pumping at work after i go back. for this situation im concerned of going back to work once He's only 8 weeks old and pumping at work. With my daughter, i suspect that i had high lipase because she would only drink pumped milk if it were freshexpressed, she she wouldnt drink frozen thawed milk+ so would i have high lipase again with my new milk or would it maybe not bother the new baby? TIA. and sorry for the long post!