I run a photoblog but need an extra blog? Any suggestions?

Here’s the problem, normally it would be easy to run two blogs on the same site if they could depend on a similar layout. Trouble is I run a photoblog with a new image on the front page every time it is updated. The layout and the theme are designed to emphasize a photo-a-day or the latest image on the front page. Now, I have a navigation menu bar in the upper right hand corner of my site and I would like to link it to a more traditional blog where I can write about photography, do camera reviews, and post articles relating to photography. It would be a nice resource for my visitors and would keep them coming back. I probably need to set up a separate installation for this blog because it will be a full scale journal in and of itself, but I am having a difficult time in trying to figure out how to solve this problem. I would like to implement it into the main site without changing the main focus that the current theme was designed for, meaning, I want the site to remain a photoblog and not a regular blog. Is this possible? :/

Here’s my site: https://talkingtree.org/