Hi Marjorie Baker. Great question! I would recommend you join a yoga program to get you started. We have a short one that will introduce you to the basic yoga moves. This would be great if you haven't done yoga before: https://grokker.com/yoga/vinyasa/program/3-steps-to-yoga-with-celest-pereira/57dbf7e596a02c934191d55c. Or there is this one that is longer and introduces you to fundamental poses: https://grokker.com/yoga/beginners/program/beginner-s-guide-to-yoga-with-michael-james-wong/5727bea7ae15771574119c49

You may then want to join one of these beginner programs:
https://grokker.com/yoga/program/yoga-basics-the-beginner-s-guide-with-celest/57dbf89c96a02c934191d5a6
https://grokker.com/yoga/beginners/program/yoga-for-beginners-with-siri-peterson-cavanna/56c4cb8555ebe0d0080df682
https://grokker.com/yoga/vinyasa/program/21-day-happy-yoga-challenge/59405eafc392055e77dd0c5e

Hope this helps. Good luck!