Some basic yoga positions for beginners can give you benefits that you might not think about. You might think you don't need the basics once you feel you are at an intermediate level, or you might think the basics won't help you because you are not flexible enough to "do yoga." All levels of practitioners can benefit from basic yoga positions.
Holistic is perhaps the best term to define yoga. The practice is one that incorporates physical, mental, and spiritual health all into one big bundle of joy. If you are ready to embark on an activity to improve overall good health, you will find that nothing else can stand up to the completeness of the yoga package.
The most enjoyable way to learn yoga, is to take one or two movements each day and practice them until you feel you are ready to take on another move or two. Remember there is no stress or pressure on you to keep up with anyone else. You do it at your own pace.