I want to do something but actually i don't know how. I confuse and worry.

I m confused about my aim. while i think a lot. finaly it comes into my mind to startup but i haven't any knowledge about how start actually. From where i start about it. i m student of b.tech C S. I need motivation, inspiration , to stand. i feel like having nothing. U know my mind is trapped into negativity that from where i start working. I start work but there are huge resources to read about it. But it make complications. So show me a path on which i can work. U can show me about what i have to learn to startup. Like marketing, inspiration, law, how collect fund.