Its very normal for a bub around day 4-6 to feed like that, they are helping to get your milk well and truly in. They are also trying to stabilize their weight loss after such a huge experience such as being born. Once this all calms down generally its 8 -12 feeds in 24 hours, but many bubs decide different and go for more to begin with.

Sometimes they will naturally fall back into the correct night/day routines themselves. To encourage it make all night feeds nice and quiet, as dark as possible, no talking etc and minimal disturbance. And daytime more active (not to much as to overstimulate). You can also offer more feeds during the day, but generally if they aint hungry they won't want to feed properly anyway and this can cause some damage.

I second only hand expressing, I've found it far more effective at making it easier for bub to attach. If you can get someone to show you how it was done, even though I had watched and read about it, I was way off track and it wasnt until I asked a middi to do it for me and she sent milk squirting across the room that I realised how to do it properly. Leave pumping milk for storage or bottles until well and truly established. Mucking around with it all can really have an effect on supply and routine. I'd wait till at least 3 months before ebm.

Your nipples will hurt in general for a couple of weeks, sometimes even though they appear on fine, it can take bubs a bit longer to get the attachment perfect so it won't cause pain. Taking on and off can help them learn a bit faster and will mean less chance of damage. I love lansinoh, and rite-aid gel breastpads are so soothing, especially if you pop them in the fridge first, you just use them under regular breastpads. They also help promote healing.