Ask HN: What would you advise 18 year old who is starting a business in India?

I and a few friends have an idea for an e-business that we want to work on. All of us are in the age-group of 18 - 20 and we are from a small tier-III town. I am the only technical guy, so I will be the one who have to set up everything. What I want to know is about the technical and legal sides of a startup like when and how to incorporate, how to register the brand, etc. The startupindia.gov.in site mostly refers to business that are already functioning, I couldn't find anything on starting one from scratch. I don't know anyone in real life who is knowledgeable about this topic and most information that I find online are mostly US specific.