Whether or not you should join a coaching institute for JEE preparation will depend on your individual needs and circumstances. For some students, a coaching institute can provide valuable guidance and support, as well as access to a structured study plan and a community of other JEE aspirants. However, for other students, self-study may be a more effective option. It is important to carefully evaluate the pros and cons of joining a coaching institute and to make a decision that is right for you.