Multiple Widgets on Different Pages and Search Engine Help

Hi there, my site is https://www.teachingtravel.com and I have two questions;

First, is it possible to multilayer my site using wordpress.

My site is based on Asia, so I have different posts related to different parts of Asia. If I changed my menu to be based on the different parts of Asia, would if be possible to edit each menu page, so that it has a separate widget layout?

At the moment, wordpress works so that you main page is different, but all of your category pages are the same style. Basically I want my other pages to follow a different style, with different widgets…

For example;

Home page – Module Three Posts (News), Module Massonary (Advice), Module Post one (Entertainment), Module Massonary (Food and drink), Module Classic Blog (Video) (this is the current layout)

Korea – Module Three Posts (News), Module Massonary (Advice), Module Post one (Entertainment), Module Massonary (Food and drink)

Hong Kong – Module Three Posts (News), Module Massonary (Advice), Module Post one (Entertainment), Module Massonary (Food and drink)

China – Module Three Posts (News), Module Massonary (Advice), Module Post one (Entertainment), Module Massonary (Food and drink)

While the home page maintains all the categories, each individual page only has the area they apply to.

Then the different pages would follow a different widget layout, instead of the same style that currently follow, which is a simple “blog layout.”

Pretty hard to explain, but may be someone understands.

Second question is an easier one.

Currently when I search my website on google, the meta description is fine (I used SEO Ultimate), but the title is just “Teaching Travel – Home”
How do I change the home page, without having to rename the whole page? I tried changing the title in the SEO Ultimate, but it didn’t do anything after a day in google, it just improved the rank by 2 pages.

Thanks in advance, I’m sorry that there is long winded questions.