My total cholesterol levels is high how to reduce it through diet?

Good start: Low cholesterol, low saturated fat diet. Read up. Don't expect any miracles. It may or may not help. You'll be doing yourself an even bigger favor if you get back into an exercise-focused lifestyle like you enjoyed so much as a teen. Cholesterol is largely genetic and if you need medication, don't hesitate. Get a few opinions, including from an evidence-based holist if one's available.