To use a star chart to identify stars and constellations, you must first find the one appropriate for the time of year you are observing. Face North to Orient the star Chart. If the star chart says South, turn yourself and the starchart south. Make sure everything is lined up correctly by facing Polaris for North. Polaris is the North Star. It is one of the brightest star and is most of the time near the horizon.
Step 2: Compare
Compare the stars on the star chart and the stars you see in the night sky. When you find Polaris on the star chart and in the night sky, you can find other constellations. It is not that hard. If you want to find galaxies or nebulae. I suggest you use an advanced star chart.