I have a OH, but if I was doing this alone I would make sure the freezer is fully stocked with pre cooked meals like chilli, lasagne, anything you can heat up quickly. Make a list on a food shopping website, like tesco and save a basket so you can go on line and don't have to waste time going through the site you already have most of what you need saved.
Def sleep when baby does, my OH had to go back to uni the day we came home so i do t have help in the day, and as he has uni i get up through the night, really you wont care but sleep is good when you can get it which is hard in the first wk as you are excited and kind of pumping, all I wanted to do was sit and look at her.
If there is anyone that can help even a friend, when they ask if they can help, see if they will do some washing for you. This has been something I have found hard and I have him here in the evenings, people wont mind.
Don't put pressure on yourself, you will be amazing.