for a start, you may want to decide to latch full time. but for you to start with low supply, you might need very frequent feeds like maybe 2 hourly, depending on your baby demand. latching can help to boost milk supply , more effective than pumping. and try to latch both side, if latch only one side, you can consider to pump other milk fr the other side after feeding.
drink lots of water or consider supplement to boost milk supply