So many questions about BF!

I am EBF my baby boy and he's doing great! I have a good milk supply and I usually only pump 1-2 times a day and each time I can get between 1-3 ounces total (between both breasts). I store the milk so my husband can bottle-feed when I go back to work. I currently have about 25 ounces total in my freezer but I just have so many questions about when I go back to work in 5 weeks.

-How much milk should I have stored for going back to work?

-While pumping at work, how many times is allowed and for how long?

-What if when I go back to work I am unable to pump enough to keep up with his feedings? (This is why I keep trying to save a ton of milk in the freezer)

-Do you still nurse when you get home from work and at night before bed?

-How many ounces do I tell my husband to feed him at each meal-time and how often? My baby eats on demand every 1.5-3 hours currently at 7 weeks old.

Thank you! I am a new mommy.