Avocado is usually eaten raw, and does not need to be cooked before eating. The key is making sure that the avocado is properly ripe, as there is a small window of time when the fruit will taste the most delicious.
Some people like to bake or fry avocado, but in general it does not cook very well. The most common dish made with it is guacamole dip, which is made from raw avocado. Your best bet is to just slice open a ripe avocado and season it with some sea salt to bring out the flavor. Zero preparation time.
Don’t make the mistake of trying to eat in avocado before it becomes ripe, or it will be inedible. Avocado flesh is very hard, but as it ripens its texture becomes creamy and luscious. The perfect avocado is slightly mushy to the touch all around the circumference.
With many fruits you can tell when they’re ready to eat by their color, but it is more difficult to do so with an avocado. Its color will change slowly from green to greenish brown and then finally black. But it is a more safe bet to judge the avocado based on its feel rather than its color.