One tip I picked up from the nursing staff was the importance of having a white noise machine at home. Babies often find white (or brown or pink) noise soothing as it recreates some of the ambient sounds they heard in the womb. NICU graduates in particular become accustomed to an assortment of noises from various hospital machines, which means white noise can actually help them feel at ease when they arrive home.

It is total shit made to spend your money.

Special reference - if you so want white or around 1000 other noises - get decent smart speaker (Amazon and alike), get larger one with better speakers inside, used is ok.

It is loud, high quality, do not require any advanced stuff to learn. Plus you can actually listed to radio or music using it.