There is a video in my library that will guide you through uploading the child theme & templates you purchased. Make sure to remember where you downloaded the files from Creative Market, you will need to access to that folder on your computer to complete the initial steps. Also make sure you have installed the Template Kit Import plugin (the video uses this easy plugin to install & activate your template files.
Once you go through the steps outlined in the video, your site should start to take shape with the new design. You will have a new header, footer and possibly some page styling visible when you view the front-end of your site. Additional steps below will help you load up your new homepage and other pages in the site to complete the setup.