I was a percussionist who sang. I wanted to accompany myself as a solo singer and found that drums and vocals really would not back me very well. Neither will Violin alone. I learned guitar and then went on to keyboard. Your a singer and a songwriter........your decision is simple. Learn to play the acoustic guitar and concentrate on chords and progressions. Depending on how much practice time you want to put in you should be up and running and singing around a campfire or doing a solo on stage at some local pub in a reasonable short time. Good Luck!