There are rules for being a paralegal: a lawyer must have no criminal record, so a person serving a sentence cannot be a lawyer.
Generally speaking, criminal punishment is a kind of punishment for those who violate the criminal law. With the progress of society, national laws and regulations are becoming more and more strict, and the contents of laws and regulations are becoming more and more perfect. For those who have received criminal punishment, many occupations will be rejected when they engage in occupations in society. This is not discrimination against such people, but the law needs to give people a warning. Since you made a mistake, you have to pay the corresponding price. This is a causal inevitability.