Breastfeeding second baby after struggles with first

I’m expecting my second in July and really hope to breastfeed for a year. My son had some difficulty latching at first and my supply was low. I was told to start supplementing with formula at about 2 weeks. I used herbal supplements, all the recommended foods, tons of water, it just never really picked up. Made it about 5 months. Has anyone had a better experience with supply the second time around? My breasts have been so much more sore and sensitive this time around so I’m hoping that’s a good sign.