I would really like to have a future career in Astronomy.. where do i get started?

I suggest books by Martin Rees, Stephen Hawking, Nigel Henbest, John Gribbin, Neil deGrasse Tyson. U'll want to be good at maths, especially calculus so maybe if ur good at maths look them up. Also, chekc youtube for university level lectures on the subjects u like (they may be a bit above ur level but u can skip the complicated bits), also u could try typing in some of the names I typed. Go on wikipedia and look up the really interesting crazy stuff: black holes, quasars, neutron stars, magnetars, supernovae, planemos and also type in "observable universe" for some crazy things about the universe, e.g. the universe could actually be finite, but the spacetime is expanding so quickly at the 'edge' that light can never catch up with it so there may be parts of the universe we can never ever reach! Don't let the complicated maths n stuff put u off, physics and the universe is mega interesting and u will not regret learning about it!