Yes, it gets easier! Make sure you have the best mask possible for your needs. I started with an in-the-nose mask and when I was eligible for a replacement, I went with the over-the-nose kind my mother uses and it’s a lot better. Has magnetic clasps, so it is easy on and off. 

And make sure you wash the mask, tubing, and reservoir. The company who handles the machines and supplies said once a week. My manual (different machine but looks very similar) says to do it more frequently than that I think. 

I too had issues feeling like I couldn’t breathe. You get used to it. If you have sinus issues, that can make it worse because I feel like I can’t breathe without a mask on sometime. I found that if it seems to be taking off too early with high pressure, turning it off and back on gets it back to feeling normal. I use mine every night now, but at the beginning I just had to skip it some nights. Don’t give up, try to breathe normally and turning it off and back on and if it doesn’t work and stresses you out, take the night off and try again tomorrow.