As you click on each one (start with the top 15 list), read some of the threads. It will give you an idea what kind of shops and if there are any issues with the company. But they are all basically reputable although some are easier to work with than others.
I recommend starting with bank shops from Maritz. They are very easy with simple reports and little to try to remember while you're doing the shops. And there are tons of them all over Phoenix.
Also try some of Market Force's fast food but the ones that are on every street corner maybe don't do those first. Lots of detail and timings. Try the ones with the $6 fee and $11 reimbursement first. Food is better and less to remember.
Time to build a bigger bridge.