Hey mother
As everyone has said the feeding is totally, totally normal. Hard work, but passes quickly.
If you choose to give a bottle (expressed or formula) to give yourself a break then in my experience do it without guilt or worry; have given miles one bottle a day since the start (partly forced to due to his NICU stay, partly through choice as I wanted DP to feel more involved and to be able to have more freedom myself at a later date) and he's has never had nipple confusion. My health visitor said that if most of his feeds throughout the day were from the boob, and just one from a bottle, there was no way he would lose his ability to breast feed. And now I thankfully have a baby who will drink from bottle or boob, formula or expressed, warm or cold from fridge gosh we are lazy
In terms of lifting, all the advice is to not lift anything other than the baby for the first few weeks. I stuck to this and had no issues at all and healed well and quickly. The only thing is that the movement of getting in and out of bed was, for me, precisely the movement that caused pain. Thankfully as I was hoping for an elcs we bought a cosleeper cot, anticipating that it would be hard for me to get in and out of bed. Even with that for the first week or so DP and I swapped sides of the bed and he did the twisting involved to get the baby into and out of our bed.
I'm sure that getting up and down, if you do it very slowly and carefully, won't do you any harm. However it will be painful and exhausting. As such I really do agree with others that in the absence of a cosleeper cot, or having baby in with you, it would be enormously helpful for your DP to do that bit for you. You will recover quickly I promise so soon it will be no effort for you to do it, but in the meantime I think his help would be invaluable. If you really do want to do it yourself, please just be very slow and careful getting in and out of bed - you really don't want to strain anything.
Recovery wise though things will get better very quickly, I promise. I know it's pretty sore but if you take it easy (but still keep active) you'll feel remarkably better within a few days. I felt totally normal again within three or four weeks apart from slight tenderness around the incision.