Welcome Corisnest! This is one hell of a site for newcomers. It was my saving grace. I am providing a link for you to look at to see the Comfort Classic nasal mask.
https://www.cpap.com/simple-find-cpap-p ... NASALMASKS
Also, on the left side of the main cpap.com page, you can choose the link to CPAP masks and then pick the type of mask you want to look at. That will give you an idea what's out there and what might be best for you. There are many threads already that will give you some insight into what people think about certain ones. You can always hit the "Search" field at the top of the CPAP talk page and put in the name of the mask and look for threads to read. You will be surprised at the wealth of information that is already here.
What will come next will be, the lab will send your results to your doctor, or whoever referred you for the study, and then they will write you a prescription for the CPAP machine. You will also get a mask at that time. Do your homework now since you do have a say in the type of mask you think will be best for you. Many people at this site recommend the Activa nasal mask for a first mask. It usually is the best for most people when it comes to leaks and being able to move during sleep and comfortability. Do you breathe through your nose? Are you a mouth-breather? If you breathe through both your mouth and nose, you may want to start with a full face mask because if you open your mouth with a nasal mask or nasal pillow mask on, you lose your pressure, although there are ways around it. But in the beginning, make it easier on yourself. And if you can breathe through your nose, most people will advise you to eventually end up using a nasal pillow route with either the Breeze, Swift, Comfort Lite or Aura. However, you will, like most people, probably start with one mask and try at least one or two or three more before you find the right one. I have been on CPAP almost two months now and am still searching for THE mask. I used the Activa, though, for about six weeks and it was not a bad mask at all.
Any questions you have, you can start a thread and you will be amazed at the help you will be given. There are people on this site that have a wealth of information and are so nice and always happy to help you in any way they can. The best part is, the support you get here is like no other. No matter how you're doing, you will always find people here who will listen and offer you if not advice, a shoulder to lean on and to vent.
Try to keep one thing in mind that I personally think is the most important thing to someone starting out on CPAP therapy. Keep a positive attitude. It takes time sometimes for it all to come together and it can get discouraging. Don't expect overnight results. It does happen to some people, but not the majority. Also, try to realize what things could have been like if you didn't get diagnosed, that what you have is fixable, and that you can and will be helped if you hang in there and keep working at it. Best of luck to you and keep us posted on how things are going.