Johnny:
You should notice a big difference in how you feel in a short time. I know you're excited about getting your machine.
My husband has had a CPAP for 6+ years. We buy white vinegar by the case (Sam's or Costo) for cleaning the mask or hose (dunno which) and because the CPAP can dry out the nasal passages, he uses Ocean Premium Saline Nasal Spray (he buys it at Costco, 3/maybe $4).
I suspected my husband had sleep apnea after hearing a friend's snoring when she & i shared a hotel room one weekend, and then she told me that she had been diagnosed with sleep apnea.
When John had his sleep study, they stopped it after just a couple of hours the first night. He didn't go back the 2nd night. The diagnosis was that obvious!
I noticed a big change within less than a week -- he had more energy during the day, didn't have headaches after awakening in the morning, didn't toss & turn during the night as much. He later told me he had almost fallen asleep while driving to work one day.
Pre-op, I remember being asked repeatedly if I had sleep apnea. I've seen it but don't remember what the connection of sleep apnea with heart problems is.
Give us an update after you've been on your machine for a couple of weeks!