Well, probably not what you want to hear, but I failed at bf ds1 and ds2, I seemed to have the same problem with both which was the latch, it got painful quite quickly. I've also got huge breasts and it just didn't seem to work with the babies tiny mouths.
But, what I will say is I really regret not carrying on, and actually, if I'd just got past all the fog of the newborn stage there were likely no problems that I couldn't have got past.
If I was having another now I'd go to as many breastfeeding workshops as I could before the birth.
I'd have everything I might need to hand, so nipple shields, breastpump, nipple cream, comfy nursing bras.
I'd find out about any local breastfeeding support groups and have numbers for helplines to hand.
I'd ask for help around the house and for help with older dc's.
Day 2 is supposed to be hard as it's a growth spurt day.
I'd get the baby checked for tongue tie.
I'd try to keep hold of the thought that it will get easier and it will be worth it.
I'd sleep when the baby slept and wouldn't let visitors stop me.
There's are lots of experienced bf mums on here who will be much more knowledgable.
Best of luck X