Any tips on how to get a fussy newborn to sleep ?

Did you try swaddling

Make sure there's no gas on the tummy, cuddle, swaddle, rocking

Let me know when you figure that out.

Warm tubby may help. Swaddling, bouncing, a swing, rocking, or they may be colic and need to cry. If you're overwhelmed put in headphone and just lay with them or rock... Or take a break if you need to and put them in a crib and shower or go outside

Put on soothing music for the baby can hear too, for you both to relax. Then swaddle and rock the baby and don't rule out binkies

bathe & then feed...mine always sleep the hardest

warm bath..

my baby can sometimes be inconsolable... but, he usually likes this sound called, In utero, on my "baby sleep" app & i'll send you a link to this special hold

https://youtu.be/j2C8MkY7Co8