i considered myself tone deaf most of my life. it was,nt till i started writing songs that i tentatively asked about lessons.these were of limited value and i suffered rejection on my first attempt at a public airing of a song despite my teachers encouragement.
what has helped me most has been the free eric arsenaux vids on you tube.he is an r an b artist and not my taste but an excellent teacher, but you need appprox 20 mins practise of the exercises daily and be prepared to give it time.theres no quick fixes but steady improvement.