Hello tristanwrable,
Thank you for your question. I'm glad you were able to uninstall Joomla successfully.
Here is a helpful link to the official Sandvox guide on Publishing to a Remote Host.
I recommend reviewing our FTP Getting started guide, since it explains how to setup FTP to publish a site.
Also, make sure you have pointed your domain to our nameservers, and waited at least 24 hours for propagation.
You can also use your server as a hostname in the meantime, it can be viewed in AMP.
If you have any further questions, feel free to post them below.
Thank you,
-John-Paul