Simple Blog Theme

I am looking for a theme like the one in the link below (this is on a wordpress.com site) where I can setup blogs and assign authors to blog on them add pictures, etc. without having to know a lot about the system. On the one pictured, all you have to do is click the WRITE icon in the upper right corner and you’re off and running.

I am using Elementor to setup the site, and I know I can add a theme from there, but can I also add a theme in WP without using Elementor? This would be on a Single SubPage, not anywhere else on the site. The entire purpose would be to make it easy assign an author to a blog.

https://www.jayjaynet.com/ff/PIC3.jpg