Hello everyone

well, I'm totally new to coding
I'm good in Designing btw...

so i have a new website which is related to gaming .....
i'm making a simple home page for it .... first i thought to use a ready made free one but can't make my mind for that

first i started with HTML but ended up with PHP
and now i want to make my home page in PHP cauz its better manageable..

this is a link to the page i'm designing :
Demo

i have done all the coding myself(not a big deal though) but the page is still under construction...
i'm still looking for good content to put in it

now.....I also have a separate Page which has a collection of my wallpapers
Wallpapers
yea its looks totally noobish but but hey i'm learning

now.....what exactly i want to do is ...

1) I want to integrate my wallpaper page with my home page
now......for that.....i want that the main top banner,navigation and other things stay same as they are right now .....and i want to load the Wallpaper page in the main container .... (actually not the hole page but just the thumbnails )
like this : Like This

Now u can see that the thumbnails are all in the container and the page looks like a part of the home page ......

now my problems....
1) As u can see that the page is a complete new page thus it will take more time to load.......all i want is to load the Thumbnails in the home page container when i click on the wallpaper button
that means i just want to load the container and NOT the whole page .....so i assume i have to use ajax but i really can't figure out that !!!

2) Problem 2 is that the thumbnails are going out of the container....
all i want to do is that after a number of thumbnails the page should get divided into 2 pages...

like: if there are total 70 thumbnails......and the container can only fit 45 at once so the rest of the 25 goes into page 2...

So in the end....the page should look like this...
I goto my website......i see the Wallpapers button.....i click on it and the main container loads the thumbnails in it without loading the whole page.....
after that when i scroll down and see that there are XX thumbnails in the page......and see a "Next" or "2" button in the bottom and click on it....again only the container loads and the rest of the thumbnails load.........and so on...

I hope everyone understands what i'm trying to say

thanks in advance