My bf aunt offered me a job where she works as a receptionist. I said hell yes! But now I'm trying…

My bf aunt offered me a job where she works as a receptionist. I said hell yes! But now I'm trying to pump like crazy to have milk for my son..training starts tomorrow from 11-6pm. Been drinking some lactation tea since yesterday and my good boob gave me 3 ounces, the slacker less than an ounce. Any other tips and trick I can use I want to have at least 20ounces for my son..