How to categorize or organize my post in website?

Hi Friends,
i am new to html css. i recently was practicing on one website and had some problem while categorizing posts on that page. Would you please help me how could we categorize or organize post.
thanks in advance

Ah yes, something that seems like it should be so simple many gloss over it, the unlucky regret they did so,

To help me get started I usually put together a very rough list in as close to “groupings” as I can.
Then I think about it, draw lines, make notes etc.
More often than not everything eventually ends up where and how it should be.

Can you post a rough list?

here :

this is what i want categorize