Increasing milk supply

Does anyone have any tips for increasing milk supply besides pumping between feedings? My baby nurses more frequently than every 2-3 hours and I’m always afraid to pump in case he wants to eat 30 minutes after a feeding. Also he doesn’t usually let me put him down for naps for longer than 20 mins at a time. I’m only able to pump 1-2 oz per breast at a time.

I should mention my baby is only 6 weeks. He was due at the end of December and arrived a couple weeks late...I was too attached to this group to switch to the January group.

Thanks in advance !