Portfolio template issue

I may be trying to do something it was not designed for…. However, I run a garden design business and want to use this theme, I have created a portfolio page called Customer Projects and have managed to get it showing at least one current project, and I guess I can add more. But I also wish to create other portfolio based pages e.g. Styles & Moods, another called photographs, another called testimonials. All separate and showing approx three different sub-headings in each leading to different pages, or linking back to another higher level page. Can it do this? Can you help, Please… New to WordPress so be gentle with me.

Dr Mac