In the lower left of your graph, it indicates some statistics on pressure that will let you put it in your profile, if you wish. Looks like a minimum of 5.0 and a maximum of 16.0.
I'll leave the interpretation to the experienced folks.
Please organize your SleeyHead screenshots like this.
I'm an epidemiologist, not a medical provider.
That is an impressive first night! Your minimum is pretty low, that could explain the feeling that you are not getting enough oxygen. I'd increase that to 6 or 7 and see if that feels better.
As for the large pressure increases, bringing your min and max closer together, over time, will help that. But take the time to let your body and mind adjust first. You might want to consider dropping your maximum to help you adjust, at the probably expense of the therapy results.