Admitting a substance abuse problem can make you feel weak—you may also find yourself with an abundance of time on your hands, feelings of emotional and physical discomfort, a great longing for something you know isn't in your best interest, and friends that are no longer an appropriate choice to accompany you on your journey through life.
The road to recovery can feel long and lonely, and it's easy to feel lost. Joining a yoga studio (and actively participating by going to class regularly, introducing yourself to the instructor, and getting to know classmates) is an easy way to build strength and a sense of community while hearing inspirational messages to motivate you.
Yoga can also be encouraging—one week the crow pose seems like an utter impossibility, and the next week you're flying high, balanced carefully with razor-sharp focus. Stick with it, be willing to fail, trust that no one is judging you and that everyone is rooting for you, and celebrate your successes—even if it's just physically staying on your mat at a time you would rather be anywhere else.
Remember that yoga isn't one size fits all. Power vinyasa might be the right fit if you feel the need to move actively and sweat, and restorative or yin yoga may be more appropriate if your challenge lies in finding stillness and breathing through discomfort. Start with a gentle beginner class or even a YouTube video to get familiar with the basic poses and then explore different studios and classes to find what feels right.