How to go about company registration

I am currently an undergraduate student and I wish to have my own event management company. I will be sole founder of the company and will later join in some students of my college, as interns. I do not know much about the registration process. I have searched on the internet through various sources, but all of it has left me all the more confused. I have read somewhere that if a company is a sole proprietorship type, registration is not required. Am I right? Also since one of the major functions that would be performed by me would require sponsorship/external project partnerships, is it still not necessary for me to register my company. If not registering my company, what other documents/ registrations are required by me, so that the sponsors do not question me about any of the legal procedures, in the future. Please guide me. It is very important for me and would be very kind of you, if you could help. Thanks in Advance.