Vocal lessons are just another bull-shit! If you can sing, it means you can sing. If you can't, take it in good faith that you're not meant to be a singer. Most well known singers are self taught or probably born for that talent.
Name me one singer who goes for vocal lesson and make it big! Yes, the might have made it but, probably land at some sleazy joints.
People normally start up at music lesson, like learning to play a musical instruments. You'll learn more about harmonising on your own as these are just basic fundamentals about music. Appreciating music the right way can improve your singing while listening to some good singers about how the voice is being controlled. Can imitate at one point but you'll know later that you have your own quality voice if you're made to sing.
Tetragrammaton