For example, you want to change the code of the Political Section from the Homepage #1.
Suppose, your real tag is Getting Started

Now follow the steps bellow,

That section code located in /partials/nf-widget-01.hbs

If you open that file, there have a code

{{#get "posts" include="tags,authors,count.posts" filter="tag:political" limit="5"}}

Now change that with your own category name there,

{{#get "posts" include="tags,authors,count.posts" filter="tag:getting-started" limit="5"}}

You can see the custom post limit too there. We used 5 posts for that section. Just change limit="5" for any custom limit.

Now to change the heading of the section change the code {{#get 'tags' filter='slug:[political]'}} with {{#get 'tags' filter='slug:[getting-started]'}}