It’s tough. Accept that every stage will have an end - so you might not sleep when baby is tiny but that phase will end soon enough.
Focus on being good enough, not superwoman.
If you have high housework standards, look at lowering them. Will the world end, for example, if you hoover once a week rather than 3 times a week?
Get shopping delivered and also I recommend milk, bread and eggs to your doorstep (but it is more expensive).
Join baby groups and have something for either the morning or afternoon every day. You don’t have to go but getting out is good for both of you.
Routines will develop. They help maintain order and keep you focused. It splits the day up and you can mentally cross off each bit until you get baby to bed. Routines develop calmness and a knowledge of what to expect. Single parenting is not the time for spontaneity.
Be proud. There is so much nastiness, so many uncalled for ‘innocent’ comments, it is easy to feel second class. You will do a great job and your little one will be lucky to have you.