I am sorry to hear that the cpap is making your baby's nose raw, unfortunately that happens alot with cpap. I don't know what hospital you are in, but maybe they have Vapotherm. It is high flow oxygen like cpap, but it is given through a nasal cannula, and you don't have that pressure on the nose. My son switched from cpap to vapotherm and it was much better for him. He hated that cpap. You can ask your MD or respiratory therapy about it. It can't hurt, all they can say is yes we have it or no we don't. Below is a pic of Christian on vapotherm.
I am glad to hear about the kangaroo care. I am happy for you..
Kenya