It sounds like you had a rough time and terrible breastfeeding advice/support with DC 1 and 2 
Firstly, I suggest looking for some good Breastfeeding support before your baby is born. Your local children's centre should have details of local support groups and/or contact details for your hospital's infant feeding coordinator, who should be able to advise on breast and bottle feeding.
Secondly, there is a lot to be said for having confidence that your body can feed a baby. You say in your OP that you didn't have enough mill after four days - but it is cometely normal to have no milk at 4 days. You will be producing a clear/yellow liquid called colostrum, which is enough to sustain your baby even though there are very small amounts. Your baby's tummy is the size of a small marble when they are born, increasing to the size of a large marble at about 4 or 5 days and the size of a ping pong ball by about 10 days. It doesn't take much quantity to fill a tummy that size! Your baby will likely suckle as if she's starving for the first week, but that's not because she's not getting enough colostrum/milk, it's because that's what she needs to do to make you produce more milk. It might be as long as an hour for each 'feed', starting every two to three hours, so it will feel relentless. But this really isn't because there's not enough milk or because its not good enough.
If you can get to a Breastfeeding support group and talk to some mums who have just come through the early weeks, I think you might get the confidence to give it a good chance (even if faced with bad advice again :( ). It is very very rare that a mother can't produce enough milk if she has the right support to feed often and long in the early days. That could mean organising help for the house/other children in advance so that you can concentrate on spending one hour in every two (literally), snuggled with your newborn, offering your breast.
I have made Breastfeeding sound like it'll take over your life. In all honesty, it might feel like it has in the early days, but a lot of that time would be spent cuddling/soothing a bottle fed baby anyway. It is easy to blame the relentlessness of caring for a newborn on Breastfeeding, when it is just the reality of caring for a newborn.
I really hope you can make this happen for you and your baby. There is lots of great (and not so great
) advice on here, and I hope you get support from a real life group too. Good luck :)