You should just go for it. Training will make vocal chords do wonder. Again depends on how much you want to achieve, and what you are ready to give up, to dedicate your time for singing (along with dance). Theories eventually get disproved. (I was just reading that all the theories of brain power are wrong, and new theories indicate that 30-50s could be better for learning!)
All the best!
Hey, thanks for the encouragement. I gave up dance in college, but I've always been interested in singing. Will look into this.