The Celestron FirstScope is ideal for observing celestial objects, with Jupiter being a prime target due to its proximity. Users can also explore the Moon, Venus, Mars, Saturn, and the Sun (with proper safety measures), as well as star clusters like Pleiades and Hyades. For effective stargazing, a guide like the Sky and Telescope Almanac is recommended to help locate and time observations of various celestial bodies. Learning to identify stars and constellations is crucial for navigation and setup, while techniques such as averted vision can enhance the viewing of fainter objects. Engaging with these practices can significantly enrich the stargazing experience.