It is a noble cause. You may register your NGO as a society or a trust, under the relevant applicable laws of your state. Though, even an unregistered NGO may be sufficient if your purpose is to help the people outside the courts, but it is advisable that you get it registered if you want to approach the courts in the form of public interest litigation. Another option is to file such public interest litigation (and/or helping the needy people) in your personal name, citing your credentials.
Dr. Ashok Dhamija is a New Delhi based Supreme Court Advocate and author of law books. Read more about him by clicking here. List of his Forum Replies. List of his other articles. List of his Quora Answers. List of his YouTube Videos.