Breast feeding

​I am 37 weeks 3 days pregnant and a FTM and have a ton of questions regarding breast feeding, pumping, storage, bottle feeding and formula feeding.

1. Do you breastfeed on both breasts every feeding? If not, can I pump on the opposite breast while breastfeeding simultaneously? If I do use both breasts every feeding, when do I pump?! Should I pump immediately after the baby is done feeding?

2. How soon can I feed the baby breast milk from a bottle? My husband is very concerned about being able to feed the baby as well so I want to be able to have the baby do both bottle and breast

3. When can I introduce formula at night? I was hoping to do half breast milk and formula at night time feelings 

4. The breast milk storage bags... If I only fill a little bit of the bag with pumping, can I store the bag in the refrigerator, then pump into it a few hours later then freeze it for storage? 

Help!!!