Welcome aboard!
Having followed these steps, you are well prepared for life as a successful reseller. KangaWeb's support team will always be happy to answer any questions and are happy to assist with your customer queries while you learn the ropes.
If you have not already done so, you may be interested to read the "Moving your site to a new web host" document which is located at http://www.kangaweb.com/freereports/migrating/migrating.pdf. This will acquaint you with the steps involved in moving a site between web hosts, and will give you an idea of what your customers will have to do to move their existing sites over to your service.