Mamaroo bassinet and another question

Has anybody used this? I’m having such a hard time with baby not sleeping at night/screaming every time he’s not in our arms. I need some sleep. I almost left the house last night because baby wouldn’t stop screaming, my SO was pissed off and we were fighting, and I’m at my wits end here. I was fully unprepared for this. So, I would love to know if you’ve used this bassinet, was it worth it? Did it help your baby sleep?

Bonus question: how am I supposed to keep it dark and unstimulating for the baby at night? If I don’t have a bright light and the tv on, I’ll fall asleep (at this point I’m falling asleep with both of them on because of the sleep deprivation) and my biggest fear is falling asleep with the baby.