Rivian has a small inventory so needless to say the site is going to be a bit lean. If you visit to possibly purchase the R1T then you won't be disappointed. They have plenty of information on the Rivian with a number of beautiful photos.
They have a configure button which took me a few seconds to find. It would be great if they added another button or two.
Rivian Contact Information:
Call Weekdays: 8 AM-8 PM (CDT)