Hey there,
I was also interested in exploring the benefits of yoga, so I started looking into home yoga practice.
Yoga, whether through a class, or as your own home yoga experience benefits the body, mind, and spirit. Sounds a little general, but what yoga does is help align the spine, strengthen muscles, teach good breathing techniques and better posture.
On the mental front, practising home yoga, either with a home yoga DVD, home yoga video or book, or with the aid of a home yoga instructor, helps relieve stress, and ground and centre you, making it a little easier to face the world!
Hope that helps, and I hope you do decide to embark on a home yoga journey!