Hi dear,
Welcome to the Kodular community!
I’m glad you got to work right away, but I think you need to study a bit first
(I don’t mean that in a bad way)
To load a file located in the assets, the URL is
where index.html is the name of the HTML file in the assets.
So, simply add a text block with this written in GoToURL.
Or you can write it directly in the component’s properties in the designer screen.