Breast feeding

I'm 14 weeks pregnant but as early as possible, I want to plan ahead of the time. I'm a working mom and it's my first baby. I don't know what is the perfect time to turn your babies for mixed feeding. I'm 2 hours away from my office and I render 8 hours a day from work. My friend told me to put my breast milk inside a freezer while I'm at work but I only have an hour after I take it but of the fridge.