There are thousand and thousands of people with a shingle out these days proclaiming themselves as voiceover artists. To be charitable, there is a range of professionalism, experience and quality among those multiplied thousands. Obviously, not everyone can be the best there is. Indeed, only one person can occupy that position in any given category or subcategory. To be successful, you don’t have to be the best, but you do need to meet certain standards both from a performance and from a technical standpoint.
SaVoa is an effort to uphold professional standards among voiceover artists. Read their FAQ. Look through their published standards. Get some background information. If you like what you see, think about joining.