Listing two categories post on same page in grid format

Dear Sir/Madam,

I installed the Customizr Pro, I apply this to my site because of the fancy design to the hover effect and fonts. I have two categories of posts. How can I create a page to list these two categories’ posts in grid format at different section, for example

Showing the first 6 posts of category 1
Pagination of category 1
Insert some custom text
Showing the first 6 posts of category 2
Pagination of category 2

If page template is needed, do someone can share the page template?

Best regards,

Kelvin.