Pumping and breastfeeding help!!!!

Chelsea
My baby is 3 weeks old, and I want to start pumping soon (I know people say to wait 6 weeks, but I have to go back to work in 6 weeks and need some saved.) Nothing too crazy, just to start a little stockpile. However, I'm afraid of my body producing too much milk. How can I avoid this? What is a healthy pumping and breastfeeding schedule? Any recommendations are welcome!