You can start on your own , by just studying about celestial objects and their properties , the planets their moons , composition , atmospheric layers , deep sky objects and their properties , star systems, Constellations. read more
Besides that, one another place which I strongly suggest, if you're staying in and around Bangalore, is Hosahalli. The grounds of a Govt. high school situated in this village is an excellent observing site. read more
Start off by joining a group. Bangalore has two active unions related to astronomy as a hobby à. Association of Bangalore Amateur Astronomers (1976) An independent, non-profit housed in the Jawaharlal Nehru Planetarium. The ABAA frequently conducts fun and interactive activities like telescope building, night sky observation and astro-photography. read more