Once the infrastructure of the live sight is up, you can get busy and publish your content.
This starts with a tutorial / handoff session, which is best done in person but can also be done by phone. After breifly looking at the general tutorial for the SilverStripe CMS (at userhelp.silverstripe.com), you learn about the specific features that I've built on top of their framework, some of which might be totally unique to your site.
This meeting usually takes 1 - 2 hours and empowers you to really publishy your own content.
As you start to do that in the days and weeks following, I remain available to couch you and hold your hand a bit until you get the hang of it. Driving process of publishing is up to you though, since the whole vision of my business is to give you that ability in a way that is more direct than with traditional websites.