Depending what time your Dh leaves for work, he watches both children whilst you shower if you want but at least get dressed, even if that means climbing back into bed. You will probably feel better being dressed than not.
Get him to prepare food and snacks for the day for all of you, either on the morning or the night before. His routine needs to change as he has 2 children, so if that means getting up 10-15 minutes earlier then he does that.
That means food is all done for you and you don't need to think about that. Use the TV if you need to, I am disabled and my children have watched a lot of tv, they do not have square eyes, they are not addicted to screens and are now adults at 21 and 18.
Remember you have had major surgery and if this wasn't a c section you would be expected to rest up. The expectation is you don't do that because you have a baby to look after. But, still prioritise yourself and your health. I had 2 c sections and just shy of 3 years between my children. If you can use childcare for the eldest I would certainly consider it.
Anyone who can come round and help, ask them to or ask your Dh to ask them to help. I have stripped beds of bloody sheets, done laundry, sorted and tidied the houses of friends who asked because in the olden days that is what your female relations would have done to help you as a Mother. Do what you can to get by. Remember, everybody fed, nobody dead is what you are aiming for.