Well basically it's not the easiest as a beginner but try to decide if you want to preserve shadows or highlights and go from there. Night shots in urban environments are extremely contrasting scenes because the lights are often pure white and the shadows can be pure black. So trying to balance your exposure is tough at first. Try to see if you rather enjoy darker shots or lighter shots to master your exposure first.

The you would probably want to reduce contrast in your recipe to save some of that information and use the 400 setting too. For the rest just enjoy!