And I'm also confused why my followers didn't come with the switchover.
Once you are set up and have your URL is place Staff can can move your email subscribers only. Followers using the WordPress.com Reader cannot be transferred because there is no WordPress.org Reader or in fact a community with shared in-house features like there is here at WordPress.com.
What's required is:
installation and activation of the JetPack plugin on your WordPress.org isntall;
posting both URLs for the underlying .wordpress.com blog and the domain into this forum thread;
tagging the thread with modlook in the sidebar;
subscribing to the thread so you are notified when Staff make the transfer.