Be honest and respectful, but don’t admit more fault than you need to. Yeah, you fucked up driving with an expired license. Admit to that and be humble. The judge is dealing with much worse than that even just that day. If you’re not an ass, the judge may be nice if you’re lucky. However, don’t admit to other things that can’t be proven. They are required to prove that you did something wrong, which obviously the license thing is easy and there isn’t a doubt over. If they try to make you admit it’s intentional or anything else, you don’t have to say anything.