Your CAC score will rise as you age, so there's not a lot you can do. If you go on statins, they'll RAISE your calcium blood levels. The idea is to help to calcify any extant deposits to keep them from flaking, detaching, and running downstream to cause a stroke.

Better indicators of your lipid-associated risk are APOb:
https://www.ahajournals.org/doi/abs/10.1161/CIRCULATIONAHA.124.068885
and LPa:
https://www.ahajournals.org/doi/10.1161/ATV.0000000000000147
If you go full keto or low carb (less than 100 gm of carbohydrates of ALL kinds), you lipid levels will rise. Many cardiologists are now seeing that this is not necessarily bad. See Dr. Nadir Ali, Dr. Eric Westman, Dr. Stephen Phinney, and all the videos on the 'Low Carb Down Under' channels, all on YouTube. Plenty of pretty-darned-hard-to-discount evidence that they show in graphs, data, newest research (that most physicians don't have time, or can't be bothered, to keep up with).