While voiceover coaching is imperative to having a chance to succeed in the voiceover business, it's also a good idea to take advantage of what you already have on your phone! Use the voice memo app and practice recording scripts. Read them and then listen back. Does the performance sound convincing and persuasive? Is the delivery similar to what you hear in radio or television commercials? If you have zero experience, the answer is likely no but this is a good way to get started!
Get comfortable reading commercial and narration scripts into this app. Most smart phones have some kind of a voice memo app. Do this a few times and then hire a voiceover coach who can take you to the next step!