@atlanta Newborn is the HARDEST stage - everything else gets easier after that (when they can lift their own heads, their guts work better, they can smile at you, etc.). It literally is the 4th trimester, it's having an itty bitty being designed for the perfect conditions of inside your womb, now on the outside, where you have to DO all the things that the womb provided automatically.
My advice to get through newborn and small baby stage - nurse as often as possible (don't listen to bad Google or dr. info. that tells you to limit feedings to a certain number or time slot at this age, it will gradually spread out as LO gets older), consult an IBCLC if you experience nursing troubles (a regular dr. or nurse or LC does not have the training regarding breastfeeding that an IBCLC does), look up some baby gas relief exercises (my hubby was a whiz at moving LO's legs around to release gas), track growth spurts AND wonder weeks (LO tends to get hungrier and fussier, etc. when on the cusp of a ton of growth or new skills), babywear as much as possible, and get a nebulizer with some albuterol for when baby gets their first cold (which might not be for awhile if you're able to stay off work longer, or might be soon if they have to go to daycare soon, either way, you want it in your house in advance for when it happens).
Most importantly, know that this phase is the hardest, and it is temporary - my husband and I will still joke now, if our 3yo is having a tantrum, or is really sick with a daycare bug, or whatever it is that's hard now, "it's not as bad as when he was a newborn!!! Remember that??" Because it puts everything in perspective and we recognize how much EASIER everything is. Honestly, the first 3-4 months are the absolute hardest, and it gets consistently easier the farther out from that you get (sure there will be bumps along the road, mostly daycare illnesses), but nothing is as hard as the newborn stage, and it just keeps getting better after that.