I am not a doctor. You should definitely talk with a doctor. But, you can google for "health blood markers" which typically includes measuring cholesterol and glucose to start with. For example:

http://www.marksdailyapple.com/blood-test-markers/

http://circ.ahajournals.org/content/107/3/499.full

https://labtestsonline.org/understanding/analytes/cardiac-ri...

Also, it's probably not a bad idea to measure your blood pressure regularly which you can easily do at home.