You can put on your own puppet show, a backyard show, community theater, or school performances. Gather your friends and put on your own shows or go it alone and do one-man shows. Practice in your living room, basement, garage or backyard. This gives you an audience and acting experience. Putting on puppet shows for your friends using different voices helps you feel more comfortable when you do any type of acting later on.
Most communities have a theater where productions use local talent.
Call the theater and find out what shows are schedule for the year and when the auditions are. Get together a smiling picture of yourself and a resume. Send that to the director of the theater and let them know of your hard work ethics and your overall availability. School productions are a great way to hone your acting skills. Every role you play gives you valuable experience.