Amateur radio is a hobby made up of many technical hobbies. You can basically do everything that utilizes radio waves. Some people just want to talk to others over long distances. Some like to enter contests: competitions where you try to make as many contacts as you can within a few hours or days, often under special rules like using only Morse code or low power. Some build their own antennas and radios. Those are “classics” but there is so much more. You can make contacts via satellite. Some people use planes, meteors, or even the moon as reflectors for radio waves. Some are only interested in the more extreme ends of the radio wave spectrum like low frequencies or microwaves. You can program digital modes, or send chat messages and pictures over radio waves. You can learn how different antennas, weather, and space weather affect radio wave propagation. Some people like to go hiking with their radios and make contacts from remote places, while others do emergency communication training. I have probably forgotten many things; the possibilities are virtually infinite.