Other people swear by Yoga with Adriene. She is a very engaging accessible teacher and has free courses you can follow on YouTube. Again, they are 30 days. You find that if you stick with something for 30 days, it becomes a habit. Believe me, yoga is a great habit!
Ekhart Yoga is also an invaluable resource. The teaching of poses is very precise so you get a good understanding of what you are meant to do. Again, you can follow for free.
But don't just watch, try to faithfully follow a 30-day program. It can transform your life and give you a good basis to go out and sample classes.
Frighteningly, there are 41 days until Christmas. But look on the bright side. That's plenty of time to carry out a 30-day course. Just imagine how great you will feel going into 2019!