Your first post was a bit of a white lie, you most definitely had more than a couple of pints and the magistrates will know this.
I take the offence was committed in England and not Scotland.
In court be polite and courteous to the bench. Always stand when speaking or being spoken to by the bench.
Be apologetic.
As it's your first time visit any court and see how proceedings are carried out (your choice). It may help to calm your nerves for the real thing.
I used to work with a magistrate.
They have sentencing guidelines that they follow but there is an upper and lower limit for each tariff.
As
@Mayhem007 says, turn up in court suitably dressed, show deference to the bench (they love that sort of obsequiousness) and just say yes no please sir.
If you turn up wearing a "I slept with a virgin last night" t-shirt and diss the bench then you'll attract the top end of the tariff.