It's definitely a good idea, and I have good experience from taking lessons although I had been singing lead for 10 year prior to my first lesson.
I have to say, though, that you should not pick just any teacher. If you intend to sing pop/rock/jazz etc, pick a teacher who sings that kind of music himself/herself, over one who's mostly into classical music. And always remember that if something feels bad in your throat you're doing something wrong. You should not feel anything in your throat while singing, even if you sing with a distorted voice.