Need help with Setting up Category as button look

Hello,

I’m a newbie with understanding and customizing discourse platform. I have a project in trial phase soon to be converted to full implementation.

Currently the homepage looks like shown below.

IMAGE 1

I have read through the articles on categories and tags from the community.

I like the category as button view implemented in as the following example.

So currently I have

Main Category---- Category 1, Category 2, Category 3…

Posts ---- Post 1, Post 2, Post 3

Then Posts tagged— tag 1 tag 2 tag3

IMAGE 2

I like this look and want my site to look similar.

NEW MAIN CATEGORY

Inside that Category 1, Category 2, Category 3…) as clickable buttons.

Posts ---- Post 1, Post 2, Post 3

Then Posts tagged— tag 1 tag 2 tag3

IMAGE 3

Can anyone help me achieve this look?

Please share your suggestions, its a bit urgent

**site not allowing more than 1 image upload, so combined the requirement into 1 image.