Sorry to hear this op. Parenting is so lonely and overwhelming. I get this. I’m just about to go back, and I can’t wait to get some grown up time at work and ds to be at nursery. I’ve been climbing the walls, tbh.
Mines a bit older, and we have almost cracked night time (I say that, but it basically means I know when he will go to sleep, and know I’ll be woken only twice in the night) I didn’t sleep train. I co sleep. I found everything else too stressful tbh.
Focus on one thing at a time - sleep is probably the main one. Take lots and lots of naps. If she sleeps, you should too.
If she’s waking lots in the night, try working on bed time routine. Bath, book, feed, snuggle/rock. Whatever works. Put her in her own bed and take yourself up to bed too.
If she’s sleeping lots in the day, try and drag out some naps until you get into a routine of 2 naps a day.
If she’s not sleeping and has too much energy, get out the house. Lots. Go for walks, sit on the grass and let her crawl around. Take her shopping with you. Absolutely anything to stimulate her.
In the house, do you have a playpen she can be in safely whilst you clean/tidy? Alternatively, I bring ds with me round the house whilst I potter about.
Invest in a robot vacuum if you can. They are awesome. Don’t stress about the housework. It never ends, so try not to focus on that right now.
When you get some energy back, maybe start some dance videos with dd. Dance with her, do some yoga with her there. You’d be surprised how engaged babies are with what we do. Plus, the exercise is will help lift your mood.
If she’s bored, go round the house and explore with her. Remember that having a baby means showing kids the world for the first time! It’s so exciting for them. Try and join in the fun.
At the weekend, Have some time that’s just for you. Go for a bike ride, go swimming (once pools open). Or have a bath and read a book. FaceTime a friend.
Then make some time for your partner. Date night/picnic. Anything to have time to talk whilst dd is busy or sleeping. I think you might be missing the adult conversation, so bring him back into your world at the end of the day and weekend and make sure you get to have a real chat.
It’s a lot right now, but it will get easier.