You can send an email to [email protected] and ask to schedule a lesson. Let them know if it is part of a bundle purchase bonus or anything like that. They will ask about scheduling options and set something up for you.
You should be very good with your Lah, Laa, and EE scales. Ken will probably listen to how you do on these and give you advice on what he thinks you need to work on. You might have a song or two that are within your present capability to work on. On lesson day, be sure to be warmed up when it's time for your lesson. You don't want to waste lesson time warming up once your lesson starts, and you will need to be warmed up in order to sing properly.