Advice anyone??

I had my daughter two weeks ago via cesarean and overall the pain sucks but to have her here is a wonderful thing. Since she's been born it's been a constant struggle to try to get her to latch on. My mother has been forcing me to attempt to but the problem is, I already have big boobs and my nipple is way too big for her tiny mouth. So far she only latched twice and afterwards it's a battle to have her continue breastfeeding. Tho I pump and give her my breast milk, I'd still like to try again with my breast. Any mom's out there that can give me a few pointers on how to get her to latch on the right way without any frustration and struggle free? And is it common for a baby to not want to breastfeed?