I’ve had it the other way round! Turn that white noise up! Are you happy to introduce a dummy to settle? And maybe a bit of bed sharing so you can breastfeed side lying?
And just know we’re more tired this time round so everything feels harder. You have absolutely got this and remember this time is fleeting, it will pass. For now try to align both their naps so you can have one too. Jobs can wait (you’ll never say ten years from now, I wish I’d done the washing that day!)
I'm sorry you're finding it tough! Every baby will be different and you're not failing! My brother and I were compete opposites too. He was a really unsettled baby and I was totally chilled. It won't be anything you've done wrong ❤️