I'm gonna go EyeDentist on you, just like I did the 18 year old kid.
If you can get off cholesterol meds by eating right, then prove it. Eat like a real human being. You know, that might have other positives! Statins have certainly shown to have downsides and Twinkies really just aren't that good. The Metoprolol is a beta blocker that will lower blood pressure and maximum heart rate. I had to go on it for 3 months after a surgery. It knocks your dick in the dirt. If you can reduce the amount you're taking, you'll likely be happier.
As far as the hair thinning, increasing DHT will likely accelerate the process, but it won't necessarily 'make it happen'. If someone is predisposed to lose their hair, then it's going to happen. The addition of Testosterone, which will increase DHT, isn't going to be doing you any favors on the time frame of when it happens, though.