Hi fishpond,
Crikeybadger has given you fab advice and good links. Kellymom is also a great source of information too (you could start here)
My DD did not latch on for over 3 days, so I had to hand express small amounts of colostrum for her. I think that she was sleepy due to the drugs I received.
Newborn babies do not need large amounts of milk, rather, they need tiny amounts of colostrum...I think that I was very fortunate that I was not pressured by hospital staff to offer my baby formula. There was no sense of panic, no mad dash for a bottle because my DD wasnt latching on. We just persevered and my DD and I eventually got the hang of things after 3 days. (I should add that my DD only lost 8% of her body weight, was healthy and full term, though she was slightly jaundiced) In the meantime I fed my DD colostrum via syringe and cup. I was managing to express between 5mls and 10mls at a time.
My biggest advice would be to ask for help. Don't be afraid to call for a midwife if you are struggling. I buzzed everytime we tried to feed in the first couple of days and I struggled with positioning etc. Not sure what local groups you have, but I would also say that its a good idea to find out about what supports there are local to you. I attended a bf group weekly, and it was a fantastic sourse of support, some time out of the house and an opportunity to have a hot cup of tea!
Put you baby to your breast frequently, do not time feeds or try to space them out.
If you have any pain get help. A tiny change to your position can sometimes be all that is needed to improve things if you have pain.
Re. confidence - I was the only person in my family to have breastfed beyond a few weeks and my confidence was low at times due to other people questioning us constantly so I have to admit that I loved my DD getting weighed to make sure that she was getting enough. Thing is, I knew she was getting plenty - there are lots of signs other than weight gain - lots of wet and dirty nappies, periods of alertness etc. I think that the most important thing is to have faith in your body.
I realise that I am rambling a little now and there are others who are fat more knowledgeable then I am...its good to read up on breastfeeding in advance so you are doing the right thing looking for info...I knew absolutely nothing about breastfeeding which resuted in lots of worry at every hurdle...I now wish that I had known about cluster feeding, growth spurts etc!
Good luck and come back any time - the support I got from mumsnet was invaluable.