Agree completely with Tyran - find a class that's convenient for you geographically, and at a good time, so that you can commit to it regularly. Then go along and check it out. Double check before you go who is teaching, so that you can be sure you are experiencing the regular teacher, and not a cover teacher. It's a good idea to arrive ahead of time, so that you can settle in and introduce yourself to the teacher before class. Explain what you are looking for, and have a chat. If there's no time before class, most teachers will be happy to meet you after class and answer questions, or discuss your concerns and interests. If that particular style doesn't suit you, the teacher may be able to direct you to another teacher that may be a better fit. Good teachers are concerned that students find a teacher and a class that works for them, so that they practice yoga and begin to experience the almost magical transformations that can take place, over time, and with a little persistence and effort. I wish you luck and joy in your yoga journey, and hope to maybe meet you at Primrose Hill some time soon!