How to make another landing page like a main?

I have main page (index) which styled as landing page and other page styled as blog (whole white background, content at left & sidebar at right). How do I make custom page designed as main page (landing) with url, for example, http://mysite.com/nickname/about-me? As I think, I may somehow work with template layouts, but how?

You need to set same page suffixes for the other page as suffixes for homepage

What the suffix and where I can setup it?

Bump. Extremely actual

Here is a sample of page suffixes usage:
https://www.gavick.com/documentation/jo ... omla-pages
You need to copy those set for your current homepage to another one.