Pumping is confusing as hell. Someone please help.

I am absolutely sleep deprived. I have migraines every day from how incredibly tired and spent I am. I need a break to regain strength and sleep or I am literally not going to be able to spell my own name.

I desperately want to pump so my husband am take care of some feedings while I sleep (day or night).

I have read WAY to many articles all saying different things and I have had it with the confusion. I don’t have the energy for this.

When I feed my daughter I feed her from one breast and then 2 hrs later the other breast.

When pumping, do I pump from the breast she fed from or the other breast?

And when and how many times should I pump? I don’t want to drain my supply.

And how long do I pump for?