I hear people saying, "I'd love to do voiceovers, but everyone says it's way to competitive".
If you stop and think about it and ask yourself to make a list of high paying jobs that aren't really competitive, there won't be anything on the list.
Of course everything is highly competitive. If you wanted to be a lawyer, teacher, or open a carpet cleaning business, you would have to deal with the same issues. You would have to network, have great skills and be good with people. The other important thing to remember is everyone does not have to like you. You are looking for a number of people who like your voice and natural style.
You are not looking to be hired by everyone.
Things take time to set up and develop. Most people who are well trained and who feel like they just have to do voiceovers do, over time, find clients who are happy to pay them for their work.
People who make a living doing voiceovers have been trained and have built up their careers over time because they love doing it, not because they were an instant success. Work hard, be patient, and don't give up:)