Form a garage band with friends at school, neighbors, or people at work. Find out what people's musical tastes are. If somebody likes the same genres of music as you, chances are you will want to be making the same kind of music.
Buy some instruments. You don't have to purchase top-of-the-range Fender guitars, but you are going to need some instruments to make beats with your garage band. The usual setup for a four-piece band is to have a drummer, a bass player, a lead guitarist and a singer.
Practice jamming together with you band. Develop your own style, rather than ripping off a band that is already out there. Usually, the singer writes lyrics to the songs but anybody can give it a go. Once you have completed a set of songs, keep practicing them until you have them down perfectly.
Convert your garage into a studio. To record tracks and make beats you need a decent computer, a music software program (such as Cakewalk Sonar studio for a PC or Apple Logic Pro for a Mac), a MIDI interface, a mixer and a microphone. This is your basic studio setup and will allow you to make and record beats.
Record each instrument separately. Set up the microphone in front of your drummer, for example, and record his rhythm. Once this beat is saved on the computer, it can be sped up or slowed down depending on what type of sound you want to achieve. Record the other instruments individually, too, and layer the recordings over each other using the music software program.
Use the equalizer option on the music software to adjust the levels of the instruments. Check frequency bars to align the rhythm of different instruments and adjust the pitch of the vocal. In short, make your recording sound as crisp as it possibly can. When you are happy with the track, save it as an audio file. You can release this through iTunes or get it pressed as a limited edition CD.