advice ?

my baby was born 6 days ago and im really trying to breastfeed this time as last time i just gave up but with this formula shortage i just dont wanna be stressed out about that.. anyways, i feel like im not making enough milk, ill latch him on each side for 15-20 mins but it seems like that’s not enough. sometimes it’s even 30 mins.. idk i feel like im not making enough, is there anything i can do/get to make more??