Charity website with Projects & Appeal sections

Hi,

Creating a Charity website and it needs the following sections;

–> Projects
–> Appeals

Within each section it will have sub pages e.g.

Water-Aid & URL will be Projects/Water-Aid/
Emergency & URL will be Appeals/Emergency/

I would like my sub pages to follow the same template layout as;
https://interpal.co/portfolio/office-guy-2/

Sorry for my lack of knowledge in this area. I hope you can help me.
Kind Regards,