Astronomy is a very broad subject these days. Planetary, lunar, solar, galactic, binary stars (at least six sub-catagories there) infra-red, ultra-violet, x-ray, radio, spectroscopy, cosmology, dark matter, nebulae, etc. Where do you want to start?
Some simple exercises are:
Watch the shape, rising and setting of the moon during the course of the 28+day cycle;
Watch how the sun moves against a fixed horizen for a year;
Learn the easy constellations and get out and look up where it is very dark.
Buy some good binocs, (7×35 – not too much magnification) and the star charts for your neighborhood.
Check where the Big Dipper is during the course of the night at different seasons.