I took lessons for years. My first teacher gave me ear training exercises to get started. Once I was able to hit the notes he taught me scales and breathing exercises. Then ( I live in Philadelphia) I went ot a more advance teacher, the same who taught Bobby Rydell etc,he taught me few more things and changed my breathing. Breathing and when to breath is important. He also taught me how to pronounce vowels properly. Recently I started working out of a vocal book from MI press. I am 48 years old and can hit high notes like never before. Not saying I am a great singer just significantly better . I am a littloe hit on Faceboook with my friends and get compliments about my voice. Remember the more you practice scales and hit the notes the better your voice will become. It takes time at least it did for me.