Learning to play a musical instrument can be a very rewarding activity for young people and adult alike. People have various reasons for picking up an instrument. Maybe they dream of being a rock star, for attracting the opposite sex, for a shear love of making music, or they may have been made to learn by their parents (hopefully they grew to enjoy it in that case).
Like any skill, learning an instrument takes practice and dedication. But, once mastered there are several opportunities available. Maybe they will join an orchestra if they play a classical instrument or play recitals as a pianist. Music studios also pay for session musicians to come in to record music for singers in many styles. Or a musician may go into music education and share their love and knowledge with future generations.
Another activity that almost every musician tries is performing with others. They may get together with friends in their parents basement or garage and start jamming together. Maybe they will even do some shows locally and build a local following. And of course there are those lucky few that have the mixture of talent, dedication, and luck that make it into a lucrative career.
Playing music is a great activity. It encourages creativity and can built confidence and social skills. If you find an interest in learning an instrument, look for a good deal on something to get you started, don't spend three grand on a drum kit that you may decide you don't want to play when you can find something for a couple hundred on craigslist.