That is a big yes. However, I would suggest that you take a class once a week - at least in the beginning. The energy and vibe from the instructor and other people there will really help motivate you. Also, looking into classes that have "flow" in the name such as Vinyasa Flow, hatha flow, etc. These "flow" classes are designed for a better cardio workout in addition to strength and flexibility. There are several types of yoga classes available so do some research for the one you are looking for as some are geared toward more meditation rather than workout.
If you decide to take a class, look for a teacher that is interactive and not afraid to tell you if you need to adjust your pose - the more accurate your pose, the better the workout and less chance of injuring yourself. Have fun and good luck!
P.S. I had a yoga teach say "you can tell a person's age by how flexible they are."