Thanks for the great question! I started in January 2013, so just over a year and a half ago. Since I started, I’ve been really consistent with it. I started going 2 times a week, then moved up to 3, and now I do yoga 6 days a week. As for motivation, I honestly just love it and can’t think of my life without it! The deeper I’ve gotten into my practice and the more I’ve learned about my body and bodies in general, the more in love with yoga I’ve become because I see how healing it is, mentally and physically.
As for getting started, I would find a studio that you like and take classes with a few different teachers. Find one you like, and go to their classes. Of course you can have a home practice only, but when I was a beginner, I did best in a class with a teacher I loved because then I looked forward to going. Plus I learned a lot more about the poses and alignment required for them, so I knew I was doing them right and gaining the benefits.
I hope that helps, and let me know if you get started!!