Alice's comment about the stereotype of a trained singer always sounding formal reflects a broader attitude to music education. I don't know how many times I've been asked if I play by "music" or by "ear" as if the two were incompatible. I do both. To me it's like asking if you're literate or do you speak natural. Obviously music studies are not for everyone, I don't know squat about computers, but I use them. You can become a fine musician without any formal training, and if you're having fun without any long term goals of musical achievement, lessons could well be a waste of time. But it's a foolish person who disregards the accumulated experience of others.My first guitar teacher was a fellow called Tiny Hostetter, he was wonderful guitarist with a horrible thin, reedy voice. Often he would sing and play. He told me not to be afraid of singing, that it would improve my playing, and that if I was too embarrassed to sing, just whistle. As much as he taught me about guitar, he taught me much more about life. He's gone now, and I'm getting emotional thinking about him.
Don't be afraid to sing, Frank i.t.s.