Step 1: Go to the doctor and get a checkup. Find out if you have any medical conditions you should be aware of and have in mind when dieting.
Step 2: Install MyFitnessPall (app) and start counting macros. Either you research it or get help from a dietitian.
Step 3: Once you've found your maintenance intake, go a couple hundred calories under.
Step 4: Be consequent and don't cheat.
Step 5: Results