You first need to install the HogWarpCK plugin which can be found on NexusMods. The content of the archive must then be unzip in the Creator Kit's install directory. You can find the Creator Kit's install location from the Epic Launcher as shown below.
Click on the three dots, it opens a context menu, click on Manage.
Click on the folder icon, it opens a windows explorer at the root.
Drag and drop the PhoenixGame folder in the install directory of the Creator Kit
You can now launch the Creator Kit.
If everything was correctly installed, you should see a "HogWarp" button in the tool bar