People do get convicted of crimes, and all jurors must find the defendant guilty in criminal trials of this sort. The jury that convicted Trump of sexually molesting E Jean Carroll was also unanimous, even though it was a civil trial.
Yes. It happens all the time in the US.
That's how it works, but Trump is a convicted criminal right now in the eyes of the law. You ought to accept that until an appeal exonerates him. There don't seem to be very good grounds for an appeals court to overturn a unanimous jury on 34 felony counts, but I don't want to dampen your hopes. You really ought to take a look at Donald Trump's history. He has been getting away with breaking laws for a long time. He is the nation's most famous scofflaw, not to mention adulterer, oathbreaker, tax cheat, and deadbeat.