Barb,
I posted in daily insights about my machine...it's really easy to get used to...they had 2 sizes, I chose the small nose-only one...
It has really helped me...anything that improves your sleep will definitely improve your energy level and your health...
By the way, someone told me she got these things that are called "nose pillows"...it has two nodes that rest just inside your nostrils so you don't have the whole mask over your nose...she said it is so much more comfortable.
You might want to go online-maybe google CPAP machines and see what is offered. Knowledge is power, as you well know!!
Let us know what you find out...