My 11 year old daughter loves these yoga pants. They are form fitting and stylish. My only recommendation is that if you are not a teeny bopper, like I'm not, then order one or two sizes up. I ordered her a small and they were a tad big around the waist but perfect on the legs. I normally wear a 4 or a 6 but I think I would order these for myself in a large or extra large.
So now that you have some comfy yoga attire, it's time to strengthen your mind, body, and soul. If you are a member of a gym I recommend starting with a very mild yoga class. Some can be really intense and you can burn 500 plus calories in one session, so start slow and move up.
If you are like me, I now mostly workout from home. There are many yoga videos on YouTube. There are some awesome yoga channels. My favorite is the BeFit channel. There are tons of popular instructors and videos.