couple breastfeeding questions, please answer

Paige

is pumping 4oz total a good amount?

how long after pumping will my breast fill with milk again?

is pumping going to increase my supply? im exclusively breastfeeding right now

how long is breast milk good for in the fridge?

should i freeze what i pump right away and just add to it until the bag is full?

sorry for all the questions!! answer what you can, thank you.