I highly recommend investing a small amount of money for Yoga blocks because the will help you when you have to stretch. Yoga comes from the East and it is a name for a group of stretching and breathing exercises that can have a tremendous positive effect on your mind and body. You do not need any special equipment except for a mat or a place to work where you will not slip as you move along the exercises.
A good Yoga kit should not cost you more than twenty dollars and it will include a mat, 2 blocks and a stretching band.
Also, if you belong to a health club, many of them offer Yoga classes and this will help you learn because you will be able to see firsthand what you are supposed to be doing and if the class is small enough, the instructor may be able to correct your posture when you are not getting it right. You will be able to mimic the moves as well as understand the proper breathing techniques by listening to the instructor.
As you progress through your diet and exercise plan, I want you to seriously consider giving Yoga a try. Yoga has been practiced for thousands of years and will continue to be used by people for their health and harmony.