Before beginning this new eating lifestyle, make an appointment with your doctor. Have your blood pressure and heart rate checked, as well as a panel of basic blood work. Talk with your practitioner about your plan, making sure he or she is on board with you doing it.
Aside from feeling good about knowing that you're healthy enough to start intermittent fasting, it'll be great to go back for a follow-up appointment and be able to compare your blood pressure, cholesterol, weight, and other numbers to see how much they've improved.
You may also want to make an appointment with a registered dietitian. You can discuss which IF method would be the best for your lifestyle. They can also help you formulate a daily eating plan that's balanced and offers your body what it needs for its health and fitness goals.