If you are in an orchestra, what will you play? Will you play a tuba, a trumpet or a saxophone? Perhaps you will prefer a stringed instrument like a violin or a cello. There are instruments that have keyboards. A piano and an organ have keyboards. There are instruments that have strings on them. A guitar, banjo and mandolin have strings on them. There are instruments that you blow into. A flute, a French horn and a harmonica are all instruments that you blow into. There are instruments that you hit with a stick. A drum and a cymbal are two things that you hit with a stick.
If you are in an orchestra, you have to watch the conductor. He will lead you through the piece of music.
You can join a rock band or a dance band if you want.
Some people learn to read music. Each note represents a sound. There are whole notes, half notes, quarter notes and eighth notes. Each one of these is held for a different number of beats.
If you want to learn about music, you also have to learn about sharps and flats. If you want to learn how to play an instrument, it is best to take music lessons.