>>3
If that's the limit of what your body can do at this moment, then that's not a bad way to start developing yourself. As time progresses, I expect that stretching alone won't be a big enough training burden for your body. You will eventually need to learn some high intensitiy exercises.
This is unless you want to go through the path of meditating through yoga stretches. There are real benefits of doing meditation through yoga stretching, I consider it a legitimate path to improving oneself.