If you want yourself or non-technical admins to be able to add simple static pages and blogs and edit their contents, I recommend installing the ckanext-pages extension.
It's also possible to write your own CKAN plugin that adds some static pages, though if you're going to go as far as web forms for editing them then you may as well use the pages extension above, but see for example ckanext-sa for an example of how to add some simple static pages from a plugin.
To install the pages extension:
# Activate your CKAN virtual environment
. /usr/lib/ckan/default/bin/activate
# Install the pages extension.
pip install -e 'git+https://github.com/ckan/ckanext-pages.git#egg=ckanext-pages'
Then add pages
to the ckan.plugins
setting in your CKAN config file, and restart your web server. When logged into CKAN as a sysadmin user, you should see the pages button in the top right.