I think it would help to set the machine as in your profile CPAP pressure 9, so you would fit the mask at the start of the therapy and the pressure stay the same throughout the night till you get used to keep the mask on all night. It's normal to wake up to find you've removed the mask in your sleep sometimes it require some time adjusting as it can be overwhelming at first but should improve with time. It may help to practice wearing the mask with the machine on for short periods of time during the day while you,re awake watching tv so you get accustomed and acclimatize wearing the mask with the pressure on. Its normal to try several masks to find the right one that leak the least so if one mask didn't work for you try another till you find the right mask to keep all night every night.
Humidity is a personal preference some like more than others and some they don,t need it. Too much humidity can cause me congestion but everyone is different don,t be afraid to experiment as no one setting suits all.
It can take some time to get used to it all. Try what Zonk suggested. Wear the mask with the machine on during the day. The fit will be different if you are sitting up but it will still get you acclimatized. Lots of people take off the mask during the night. CPAP version of sleep walking.
When you say 15 killed your nose, what happened? When you get used to it all, you should slowly increase the pressure back up to 15. Especially if the data is telling you it maxes out at 12 every night.
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Breathe deeply and count to zen.
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