I agree with the last two posts
Like it or not when you lead a song you are performing, so be as good as you can be, practice practice practice and then practice some more. If this gets boring, remember it will be boring for your audience as well. However at some point the song will "click" and you will be happy with it.
This is the time to start to sing it in public, you will enjoy it and the audience will enjoy it too, and this will increase your enjoyment
Strive for perfection, avoid mediocrity
So for me it's no books, but loads of practice
I'm off now to practice……