Pumping issues

I ebf and my 3 week old is having enough wet diapers and is above birth weight so I know she's getting enough. I'm trying to add in pumping because I would like my husband to help with night feeds. I started pumping once a day in the early morning but I only get .5 ounce total from both sides. Any tips for getting more from pumping? Also she feeds on the left side for only maybe 5 minutes max. I end up putting the haaka on that side and hand pumping. I'll get about 10ml by doing that.