https://catchthemes.com/themes/catch-flames/

This theme is one of the ones installed on the network - and one of my favorite to use. The link above give some details and instructions. It is a great theme to use as you have many options on things like side bars. Left, right or both. It also works real well on smart phones.

The catch themes company offer quite a few free themes. If you see one of them you'd like to use, submit a support ticket.

https://catchthemes.com/themes/category/free/