Hi,
sorry, do you know how to use Joomla at all?
WordPress vs Joomla works in a different way.
At least please read this:
https://www.joomshaper.com/documentation/joomla-templates/dylan#how-to-install-quckstart-demo
------
What are the advantages of Joomla vs. Wordpress?
Easy to find on Google. It's a topic for a long article, even a book chapter, not a forum answer.
Besides the number of opinions, the most important difference is that in Joomla you need fewer plugins, components (extensions) to launch the website. For example, I install maybe 3-4 (firewall, backup, sp page builder, SEO) - to get all the basic features I need. In Wordpress min. 10 and I am not even close.