Hello,
Thanks for your Patience and Apologies for the Inconveniences caused!
Canvas is a static HTML5/CSS3 Template and installation is simply like Plug and Play. Consider generating a Custom Package here: http://docs.semicolonweb.com/docs/getting-started/installation/ according to the HTML Files you need for your website and our Package Generator will sort the Files for you to download. Suppose, you need the demo-seo.html Template, simply choose this File in the Package Generator and then press the Generate button. A Custom Package will be generated for you only based on your selected file.
And then you can simply edit those HTML Files manually with some knowledge of HTML/CSS according to your needs in a Text Editor like Sublime Text/VS Code and upload it to your Servers using FTP. We recommend starting with a Localhost Setup on your personal PC/Macbook before you deploy using FTP (in the public_html (Apache) or /var/www/html/ (Nginx) Folder). After you finish editing, you can simply rename the demo-seo.html Template to index.html on your Servers.
Since, currently Customization related Support or Installation Support is not included with the License according to the Item Support Policy: https://themeforest.net/page/item_support_policy . You will need to manually set this up or Hire Us to help you out with Customizations. Thanks for Understanding.
Hope this Helps!
Let us know if we can help you with anything else or if you find any further issues.