Transcription is a quite in demand industry today. There's also a strong demand for general transcription services, even if you have heard of medical and legal transcription. Demand for general transcription comes from the mass media, which want their interviews of the resource persons and their programs to be transcribed for documentation.
Same with companies who hold face to face presentations, conference calls, focus group discussions, and meetings, that would need to be transcribed. Schools for the deaf also require transcription, making the need for general transcription services powerful for the years to come.
To start off you on your new career, you need to find transcription rates firms that are valid. A quick search on the Internet should have the ability to offer you early leads. Search for a company that would reward you for your efforts.