Owner of Creative Arc and member of the EECA. I've been building websites since NCSA Mosaic was the latest browser, and have been building in ExpressionEngine since the pMachine release.
The team from Creative Arc will walk you through everything you need to build an E-commerce site with ExpressionEngine and CartThrob. They will cover planning the schema, configuring CartThrob, and building the templates that allow it all to come together. This is a great opportunity to learn what ExpressionEngine and CartThrob can do from an experienced team.