I would actually recommend pumping AFTER your morning feed, rather than before. That way your lo will get however much he needs and you won't risk depriving him.... After he's done, wait about an hour and then pump. If you're single side feeding, though, you can nurse from one side and pump from the other. It's true that morning is the best time as your supply is highest after the long sleep (hopefully!) at night, so you should be able to get a fair bit. As for the amount, every baby is different, but you could try 3 or 4 oz and see how much he takes (I'd be suprised if a 2 month old would take more than that and might take less).