Buy a book, go to the library, look more closely at your eating and exercise habits. Solve the problem yourself. Many times individuals look at the details of an endeavor without having any idea of where the detail fits in with the big picture A thorough understanding of any undertaking is necessary to inspire confidence in yourself and your abilities. Finally, as with any worthwhile effort, expect for there to be difficulties and twists and turns in the road. Don't look at these as obstacles or barriers, only challenges which will only cause you to rethink your strategy, double your effort perhaps, and spur you onto greater and better accomplishment.
Any accomplishment achieved without effort is nothing to be proud of.
Look at overcoming challenges as the gold, ultimately the true reward of any undertaking you might aim for.