Hello Clare H-T - Welcome!
Singing is a great start. There are many ways to get into VO work.
If you could tell us a bit more about yourself, and ask some specific questions, I'm sure you'll find this a friendly bunch.
So, do you do theatre? Improv? Have you read books on VO or joined any other sites?
If you browse around the forum, you may find that some of your questions have been answered. Feel free to send me a "Private Message" (or PM) if you'd like...
Inquiring minds want to know!
Nice to meet you,
Joe J Thomas
www.JoeActor.com