My recommendation is to go to the ICF (International Coaching Federation) site http://www.coachfederation.org

You will find great information and answers to your questions. I would recommend that you hire a coach who has invested in their profession by becoming certified or earning their ICF credential.

Most coaches offer a free call or meeting. Come prepared with your questions. Inquire as to the experience level of the coach in your particular area of interest or need. Fees range based on experience, credentials, client base and areas of focus.