I was in the same situation as you when my bb was born.
bb will make me pain and after his sucking my nipple will turn into the shape of NUK silicon-nipple.
I have given him bottle after direct feeding in the first few days as he came back from the hospital. However, it is true that if you can insist to feed bb directly, bb will learn how to suck form your nipple very soon.
Try not to feed bb with bottle.
It is very important that you have to ensure the way of sucking is correct, otherwise you will be painful.
Yes, using NUK the lower lip of bb will be turned outside.