Any suggestions on getting accustomed to a CPAP machine?

I have very mild sleep apnea but my doctor and I decided to give CPAP a try. I have one with nasal pillows. I got it working and fitted properly but I’m a little leery on giving it a go tonight as I have a busy clinic schedule tomorrow. Thursday morning I’m off so I’m going to try it tomorrow night.

But any veteran tips on how to get accustomed to it?