I had to purchase Observing the Universe: A Guide to Observational Astronomy and Planetary Science, by Andrew Norton, for the Duke TIP program at PARI. It explains in good detail many aspects of observational astronomy. Good book for a serious introduction to this subject.
It’s rare to find a professor who teaches with the enthusiasm and fun of MIT Professor, Walter Lewin. Which is why I highly recommend the his video lectures on Physics. Also, I would suggest watching the physics lectures of Richard Feynman.