The love of voice over has to be primary in your mind before even stepping out of the door to purchase your microphone, pre-amp, cables, microphone stand and even your whisper room to make your own home studio. The job itself the reading part is the easy part but if you work from a home studio a lot of the editing is performed by yourself in a closed room and can take a lot longer than the original performance (recording). If you cannot hack long hours in your recording studio editing out breaths, bringing the life out of the sound you have produced.
The thing that usually brings most amateur voice artists down to earth with a big bang is the fact that the competition is as fierce as the fiercest of fights in any Tarzan versus the crocodile scene from those old Tarzan movies. You roll this way, you roll that way and once you get to the surface you feel victorious. But that's Tarzan and Tarzan had some amazingly powerful lungs so when he was in a death roll (waiting to see if he had got the part) he would always be the victor. Voice acting doesn't work that way. The person or company requiring the voice know full well what type of voice they are looking for and because it is already in their mind they are pretty much decided as soon as a voice comes close.
The thing is you never know what they quite what the person wants unless they are in front of you informing you of what they really want. Voicing for an audition over the Internet can be very vague, many times I have seen they are asking for a husky voice or another type of voice and you say to yourself I can do that and then you see 'casting completed' or 'chose another voice artist' and all because they weren't clear enough in their instructions and wanted a female British English voice over with a husky voice and not a male British English voice over artist. Sometimes you get it all right and come head to the surface out of the death roll and become the victor but being that most of these people looking for talent are agents sometimes even then they are auditioning from two or three different websites and then drop you at the last minute. Or they have to give the recording you made to a further group of people and although they have paid you they trash your voice over version and go with another version from someone else. All very frustrating when you think you have the part.
So, do you have a love of voice over can you make it work, will you not get overly upset when you are turned down and not blame yourself but try to keep your head held high. Can you put up with flighty agents or know what they want and change their minds constantly, can you put up with people who don't pay top pay but are even more particular than the agents. Can you put up with the long hours of auditions only to find you don't get the part. If you can then voicing could be for you because like all great actors at one time they were all in a similar position keeping on two jobs just so that they may continue in their art only later to become the latest thing on the scene. You just have to keep at it and keep the love of the art real.
You may not make it but if your interest in voice over is based on love of voicing alone and not the money then you have a very good start because it is this love voice over that keeps you going.