Better hurry tf up and claim a job that looks decent before it very, very quickly becomes unavailable. Jobs that looked decent to me as a beginner were a combination of being short in length and a higher audio quality score. I wasn't as concerned about how much I was getting paid as a beginner, just concerned about completing enough of the required jobs to advance to the next performance tier and increase my confidence.
I had to slow each recording down so I can capture as much as I could which is a good feature they have available. But the issue is that it is very hard to actually HEAR what people are saying for the vast majority of jobs I have EVER attempted to transcribe. It is so bad that it is pathetic and I have given up at this point.
I think you should still try it for yourself though.
A lot of the available work is very difficult audio, which decreases your words per minute drastically, resulting in pretty low hourly rate. Also, I've had projects graded improperly. The corrections made to my project were far worse than my errors. It was eventually corrected, but I had to go through several people with my complaints.
Rev is a fun and freeing company to work for. Once you pass a short assessment of your skills with speaking and writing English, grammar, punctuation, listening comprehension, etc, you're able to finish the learning process with Rev's captioning software and begin claiming captioning work.