I would like to do Data Entry from home as a business. How do I get started & avoid scams?

My husband is out of work and we are desperate to do almost anything. He’s always on the computer sending out numerous resumes a day and he type’s well. There are so many advertisements for Data Entry and Transcription jobs where you can be self-employed. It sounds like a great thing until he can find steady employment but we’re worried about scams and need some advice.
Thank you