G'day Lorraine, welcome to Apnea Board.
You've come to the right place - there is a LOT of information and advice available on this forum. The Wiki
is a good place to start - see the link at the top of this page. There you can browse anything that takes your interest. The list of acronyms
will be especially useful.
To manage your therapy properly you will need to know what's happening with your breathing each night. The excellent SleepyHead software
will display your results in great detail, and plenty of people here will help you to understand them.
The best general advice I can give you right now is don't panic, keep calm and breathe.
Lots of people see this diagnosis as a something terrible, when really it's an opportunity to greatly improve your quality of life. Breathing with the aid of a machine is just breathing. There's no special skill or ability required. It can feel strange at first, but that quickly passes. The hardest part is to get a mask which fits properly and is comfortable. Be prepared to try several different masks until you find the one that's right for you.
At this stage, we really need you to share some information with us, so that we can provide more specific advice. Please tell us about your diagnosis - did you have a full sleep test? Do you know what your apnea-hypopnea index (AHI) is? Do you know the breakdown between obstructive and central events? If you don't know these things, please ask your doctor for a copy of your sleep test report, and ask him/her to go through these items with you.
And, importantly, what type of machine have you ordered?
Good luck, and welcome.