Fat & Unhealthy.... but I'm back

A bit of a long intro, but I just want to share this and ask a couple of questions, I ask for your indulgence.
I've always had trouble with my weight, I was "The Fat Kid" from the earliest I could remember. When I came to Japan 25 years ago I was in decent shape, about 84 Kg and very active. I did a martial art called Aikido, and I trained a LOT.
Got married, had some kids, got VERY busy and stopped doing Aikido. Over the years I've worked very hard and I've gotten badly out of shape.

My worst was 136Kg.

A few years ago I got back into shape, started riding bicycles again and got down to about 105Kg. Then things fell apart, a bout of cancer, and bad case of osteoarthritis in both knees really slowed me down. I get injections every three weeks so I can walk, but no more long walks for me. I was on the FitBit thing a few years ago, one day I walked 21Km, but that is no more.

I know I really have to concentrate on the food I eat, not the exercise I can do.
Then the other day I woke at about 6:30AM with a horrible weight on my chest and tightness, I really thought that was it, I'm going to die. I could not move, I just laid there waiting for the end. It felt like it went on for an hour, but most likely it was 15 min or less. I just laid there afraid to move. I then woke up at my regular time and told my wife I needed to go to the doctor.

After many tests the heart specialist says I did NOT have a heart attack, but a form of angina called Coronary Spasm, where the coronary artery collapses and restricts blood getting to the heart.
My blood pressure is a bit high, but not drastically so.
My good HDL cholesterol is low at 36 mg/dal it should be between 41-84 mg/ dl.
My bad LDL cholesterol is high at 0.61 mg/dl it should be between 0-0.3 mg/dl.

The doctor put me on Crestor 2.5mg once a day, this is a cholesterol lowering drug.

If you have read this far, thank you

Now I was told by the doctor to NOT eat these foods:
Mayonnaise
Eggs
Milk
Butter
Yogurt
Fish eggs

Now mention of HFCS or carbs, I don't eat a lot of eggs, and really nothing on that list is something I over indulge in (especially the fish eggs, yuck!) Is there not new data out there debunking a lot of the "Bad cholesterol from milk, eggs and butter" argument? Is my doctor out of step?

I've cut all grains from my diet, and the only sugar I get is from an orange or apple I eat.
Thank you all for indulging me by letting me share this, I hope I've not wasted your time.

Domo