Thank you so much for bringing up point #3! Cholesterol and CoQ10 are made in the same pathway. Statins inhibit this pathway in order to lower cholesterol. Unfortunately, statins also lower CoQ10 levels during this process.
Ubiquinol is better absorbed than regular CoQ10. A water and fat-soluble form is the best way to ensure you are absorbing adequate amounts of your supplement. As Ragnar54 mentioned, testing your CoQ10 levels is a great way to see if your on track.
One point about statins that people need to know about:
Statin can lower natural CoQ10 levels in the body. This can be a problem because CoQ10 is essential for energy production and muscle function (this may be why muscular side effects are common). If you must take a statin, please also supplement with CoQ10.