Trying to pump after 9 months

In the beginning I pumped and mad a little supply nothing extreme because I knew I wasn’t going back to work. For the past 7 months I’ve been EBF. No pumping just my daughter and my boob every two hours. I want to start getting back to work or at least having a little supply so I can do things. Any advice to start pumping again? I just tried to pump for 15 minutes and barely got an ounce. Usually I pumped a lot more in the morning so I will try again. But any advice would be great! I’m not a fan of pumping but now that she is older it’d be nice to get away. I almost made it to a year only two months left so I really don’t want to start formula. Thanks in advance!!