I preferred to take my advice from someone who has actually breastfed, and I found that good advice was available from La Leche League or the NCT. The NCT have a number of publications about breastfeeding, leaflets as well as books, and I found them most useful.
At first it's hard to get a "routine" for breastfeeding started - just feed when the baby seems to want to. Which can be every ten minutes to start with! But feeding on demand is one of the things that gets your supply moving, so imo starting with any routine from the beginning is counterproductive.
You don't need an electric pump. You can manage to breastfeed perfectly well without expressing at all, if you choose to. GF recommends expressing and giving the expressed milk at a particular time, but if you are breastfeeding it's usually easier just to offer the breast instead rather than faffing around with bottles. Giving an expressed feed, particularly in the early days, may interfere with your milk production as well. You may find you want to express later on, in case you want to leave the baby with someone else to feed, but you will probably want to get breast-feeding well established first.
I don't know what GF means when she suggests five minutes at each breast to start with, but the usual advice (and what worked for me) was to feed from each side for as long as my dd wanted to, and then offer the other side - she usually didn't want it. Feeds were shorter to begin with, when I was only producing colostrum, but once the milk came in and I got better at feeding, dd wanted to feed for longer. Once feeding is established, if you only offer five minutes at each side you will probably only be giving foremilk rather than the more calorific hindmilk, which won't be enough to satisfy your baby.
With regard to breast size, I was a 48K when I was feeding, and I managed it for 2 years without suffocating my baby! It really makes no difference at all.