No Idea what you are asking.
Somebody commits a crime, an investigation occurs, an arrest is made, and the suspect is booked. He would then get a court date.
The first step of the court process in a criminal case is arraignment. That is where the charges are read to the judge that are against the defendant. They also enter in their plea of guilty, not guilty or no contest. I believe this is also where bail is discussed.
It then goes to a preliminary hearing where the evidence is put forth. This is where charges are either dropped or they go forward.
IF they move forward with charges and a plea of NOT guilty was entered, it would go to trial. If it’s by jury then there are 12 jurors who hear the case, evidence is presented, witnesses speak, so on.
The first day of the trial is where opening statements occur and an outline of the case begins.
Then it goes on (I think the Prosecutor goes first) to one side giving evidence, having witnesses, all that. Then the defense does their bit, then on the last day is closing statements and a summary.
Then the jury goes off to decide, and when they decide the court is called back and charges + verdict is read.
I believe the sentencing occurs on a different day than the verdict being reached.
That’s the process, I hope that answers some of your question because I don’t know what you mean by “first day”
I also don’t know what you mean by problem. Any problems are figured out during the Preliminary Hearing. There shouldn’t be “problems”