I've never done yoga before and don't know much about it. How about you?
I have not done it, but I would love to try. I know it is great meditative and spiritual physical exercise. 
Yoga
Hatha and Raja are the most common types of yoga.
Yes, I have heard it can be very relaxing. I wish I had more time to try it out. I could use doing something relaxing.
The origins are thought to date back to pre-Vedic Indian traditions.
I have never heard of those. Do you know more about them?
to pre-Vedic Indian traditions; it is mentioned in the Rigveda, but most likely developed around the sixth and fifth centuries BCE, in ancient India's ascetic and śramaṇa movements. The chronology of earliest texts describing yoga-practices is unclear, varyingly credited to Upanishads. The "Yoga Sutras of Patanjali" date from the first half of the 1st millennium CE, but only gained prominence in the West in the 20th century. Hatha yoga texts emerged sometimes between the 9th and 11th century with origins in tantra.
Yoga
you a service; so you feel yourself bound to give me something which I am not to give to a neighbour, unless he has done something special for me. I have heard of this kind of thing; but pardon me for saying, that it seems to us a troublesome and roundabout custom; and we don't know how to manage it. And you see this ferrying and giving people casts about the water is my business, which I would do for anybody; so to take gifts in connection with it would