I know there are some lovely people on here, on Reddit, and in the real world who will help you out with your little guy's diapers. Have your tried Amazon Mom? You get free 2-day shipping, and 20% off diaper subscriptions, I do believe. (I'd also encourage you to look at reusable and cloth diapers if you fancy saving money in the long run - I can give you some links for advice and such if you'd like, just PM me!)
C-sections, and the recovery period, are often really downplayed, and it can be incredibly hard for mum to look after a baby, look after a toddler, and look after herself. You are doing incredibly, in a not so incredible situation, and you should hold your head very high for it, not apologise for asking for help, and be proud of the mother you are to your two wee ones.
I've ordered things for your little girl's birthday, as every girl deserves to be a princess at least one day a year! The following should be arriving at your home by May 1st (according to Amazon anyway, lemme know if it doesn't appear!):
I hope you both have a wonderful day!