It’s not in English but hopefully this video might be helpful
Have you tried nipple shields? You could also find a local breastfeeding support group or see your midwife for some help and guidance. My girl struggled initially but with a little help From the midwife and once my milk came through properly we’ve had no problems. Don’t give up if it’s what you really want to do but also don’t beat yourself up about it. Your baby is being fed and that’s the main thing x
Download the app birth and beyond that helped me as I was really struggling I still am but it’s better turns out she has a tongue tie Also going to breastfeeding groups helped having an expert look and see I’m doing it right
https://globalhealthmedia.org/videos/attaching-your-baby-at-the-breast-portuguese/