no one can give you a definite answer, that's for sure, but thai would sound about right by the looks of it, but this is simply a guess, as would be anyone's answer..
you can grow it indoors, sure, you might want to start flowering pretty soon as sativas are known for huge stretches in flowering, and can continue to grow upwards for a good 5 or more weeks once you begin 12 / 12, and by just looking at this and the fact that you say it's only two weeks, i'd say it can get rather huge rather quick, so i'd start flowering it pretty soon to keep it as small as you can..