I’ve used a CPAP for 16 years. I never sleep without it. I personally know two people who had untreated sleep apnea who died in their sleep. Another friend had a severe heart attack but survived. It’s a serious thing.
As for advice I would recommend you have regular checkups with your sleep doctor and be sure to replace your mask, tubing and filters regularly. If you scrimp on that you can get an infection.
Good luck with your treatment.
Very good advice. I use one too.