Here are two of my favorites among the many books written on astronomy for amateurs. For teens and adults, this first book covers astronomy in short, easy nightly viewing assignments. Each night's assignment is self-contained. Learn your way around the sky and become familiar with the major landmarks. Astronomy is best learned in little chunks spread out over a long time.
Eclipses come sometimes years apart.
Planets go through good viewing months and bad viewing months. The nightly constellations change seasonally. There are interesting things to see every night, but they are different things every night. Learn to take what the sky gives you. Week by week, month by month, you will gradually discover more and more.