What I learned Today

Days ago I saw this video, and I watched it. I don't know how it made me motivate to exercise again. I was curious what videos did she watch in order to achieve her goal. And I saw this: I was amazed on other reviews given since all of them says that "it's really difficult, yet, it achieves weight loss in a healthy way". So I said that I wanted to try. Background about me: I'm 20 years old female college student who is always in front of computer, and sitting for hours everyday. Yes, I am not active at sports, or exercise at all. I weight 49kg with a height of 5'1 however I want to make myself more fit and healthy, and so I wanted to try this workout if this will be going to work out. Do I do some kind of a diet? I have no literally idea how to undergo diet since my parents are the one who are planning what I should eat. I don't eat much rice. In the morning, I eat oatmeal: just add hot water and that's it, then by lunch I eat some...