First, this is not within the jurisdiction of the public security organs. The prosecution belongs to the court, the public prosecution is the procuratorate, and the police generally do not participate;
Second, even if this person is willing to help you personally, as mentioned above, the police inspector is a law enforcement officer, not a legal expert, and he may not be knowledgeable. You know what this means-first, it is not under the jurisdiction of the public security organs, and second! Just because he is not under the jurisdiction of our public security organs, this person may not have knowledge. He is familiar with the law and litigation. It depends on this person's knowledge and accomplishment. This is incalculable. If this person has been in the grass-roots case-handling team, not in the legal department of the Ministry of Justice, he will not know much about litigation under normal circumstances.
It is ok for you to institute criminal proceedings, but if your purpose is to extort money from the man under the threat of litigation, it will make people disagree. In addition, you can also file a public prosecution with a civil lawsuit and demand compensation. Maybe you're looking at the amount of money. In fact, your criminal private prosecution will be even more troublesome if you don't understand the law and practice. This is not just an indictment, a list of evidence, mediation, trial, talking with judges, clerks, assistant judges, and talking with defendants' litigation agents ... It is all part of the game, which requires not only legal expertise, but also a lot of knowledge outside books, unwritten rules of light and darkness, personal relationships ... This is not your own business. A lawyer's agency fee is only a few thousand dollars. If you save this money, you may pay tens of thousands less for a lawsuit because you don't understand. Which side do you think is more and which side is less?
Also, what do you mean by "you can't even get into the court"? What do you mean "minors are not allowed in"? Are you a minor? You're underage. You want to sue yourself? Are you kidding? Nonsense, nonsense, nonsense, nonsense.
And if you are a minor, where is the crime of bigamy? ! If you can't get married as a minor, even if you have children, it is illegal cohabitation, not bigamy.
You give me the impression that you really don't know the law and practice. I suggest you find a reliable lawyer. Going to court like this is tantamount to going to the battlefield empty-handed and being black and blue.