Voice Acting is a craft, and requires practice and training. How much training you need will depend on factors like your natural aptitude and experience using your voice. When I started my own voice acting biz, I trained with renowned L.A. VO Coach & Demo Producer Nancy Wolfson of BraintracksAudio.com. Depending on what kind of VO you’re hoping to do, I can recommend some other coaches.
Note for my radio peeps: When I started in VO, I was using my voice every day as an on-air radio personality – but quickly discovered that voice acting requires a different skill set. No matter your background, I recommend you DO get some training. Almost every script you’ll see calls for a “natural, non-announcery, non-DJ read.” Producers, Directors and Agents do NOT want DJ’s. They want and hire actors and professional VO talent – so make sure you read the words on the page as if they were your own, while also interpreting the character described in the script. In fact, I use my legal name for VO and a stage name for radio. Your read needs to sound as though the words on the page are coming from YOU, in character…not a DJ read that’s sing-songy with no connection to what you’re actually saying.