What happens if I got caught stealing $50,000 from employer and I have no priors?

You are chargeable with a serious felony. Having no priors is a good thing, but your employer will have a strong say in your punishment. In Miami, you are likely to get a lengthy probationary sentence and a withholding of adjudication (no conviction). In other Counties you may do some jail. In any case, you will be ordered to pay restitution to make your employer whole.