You cannot sue the state because you don't like its family law code sections in general. That fails to state a claim. Your statement is void for vagueness. No judge would have any idea what you are talking about. If individual code section(s) were applied against you somehow, and your case was properly before a trial court, on the record, and objection(s) were made that the code section(s) violated specific portion(s) of the state or federal constitutions, they could eventually be held by a higher court to be unconstitutional, which would void those portion(s) of that law.
The easier approach is to convince your state legislator(s) to reform the parts of the law you find objectionable.
Like Mud said "public service" is such like being a district prosecutor/attorney or an assistant disrict prosecutor/attorney. The other side the private which is on the other side of the aisle who are working for the interests of the prosecuted (criminals) or those filing against the state/city. Private pays more but involves high amounts of lieing, concealing the truth, and twisting facts to win big bucks or get criminals aquitted.
Pro-Bono means for free which is also done at times in the private sector for making a name for oneself or other personal reasons. But "public service" lawyers do get paid.