Glad to see you are now using the machine
it is not easy for some to start using the xpap machines.
Dryness can be helped with a humidifier.
Masks are always the worst problem as no two people have the same shape or size of face. You appear to have found one that works for you so thats good.
A lot of sucess with cpap is making up your mind it is going to work. Then it is just getting a mask or nose pillows that you are happy with.
Believe me you will know when it stops working for you, tirdness, not feeling refreshed in the morning and some people suffer headaches. If this happens to you an odd time it is usually just a bad night, just take care that day, but if it lasts for a few days call the clinic for advice. If you get a cold it may affect how you feel in the morning so allow for that.
Welcome to the world of Hoseheads.
A long extention cable and adapter need to be taken with you at all times, I found one with at least a three sockets is required as phones and other small things need plugged in as well.
Take care and don't be shy in asking anything. We are not doctors so we can only go by our own experience.
Phones are not easy to type on so if bits don't make sense it is my big fingers