You can find out that the lawyer is not for you.
For example: on not receiving proper benefits: He did not know the 1000 hours annually rule for ERISA retirement accounts.
He did not know the Texas Administrative Code 30 hours a week rule for medical benefits coverage.
He did not know that the Texas Workforce Commission does not handle claims against political institutions like school and college districts.
He seemed to be a little shaky in math. Multiplying the number of hours worked by the lost benefits and reduced pay puts the claim well above small claims court.