Thanks for writing in!
I checked your site and it is same as the demo, only thing is there no content and the slider on the page.
To make the site similar Look please active the post carousel and Post Slider.
Make post randon order.
In the blog Option, make the Filterable Index as On and the field blank.
Regarding the dark theme, there is no such option to make Ethose dark but you can try custom CSS or adjust the menu bar color.
WooCommerece works perfectly in the theme, I am not sure what exactly you have the issue, let us know we can help you on this.
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