Looking for help with gallery

[donturo]

Hello and thanks for reading my post. I have created a wallpaper site, the URL is http://www.dekei-carwallpapers.com/ and of course it must be easy to update and flexible to work with. My main objective: Being able to add new wallpapers to the site by only uploading the images and creating some new links. So here’s where PHP comes in. I tried my best at creating something with php, but the update process is still very tedious and too slow, I know this can be easier. If only I can create php pages that can call for all the right values.

I've been browsing the web for days trying to search for an answer and trying to learn the basics of php, but it just seems that all the website I visited have a steep learning curve.
I only know basic HTML and can implement a javascript, and if I try real hard I can partly customize pre written php scripts, and most times I can’t even get that done.

So of course I don’t expect someone to write complete codes for me, but a push in the right direction would be very much appreciated. I am very much confused.

More detail on how would like to have the website:

GALLERY INDEX PAGE
http://www.dekei-carwallpapers.com/main.php?item=show/index/brabus-rocket&meta=brabus-rocket
WILL BECOME: index.php

- - - - - - - - - - - - - - - -
CARNAME (image)
- - - - - - - - - - - - - - - -
CAR THUMBNAIL
LINKS TO DIFFERENT RESOLUTIONS 800X600 / 1024X768 / 1280X960 / 1600X1200
horizontal line (image)
- - - - - - - - - - - - - - - -
(loop thumbnails)

--------------
GALLERY PAGE
http://www.dekei-carwallpapers.com/show.php?id=brabus-rocket&meta=brabus-rocket&image=brabus-rocket/brabus-rocket-01-800x600
WILL BECOME: show.php

- - - - - - - - - - - - - - - -
CARNAME IMAGE
LINKS TO DIFFERENT RESOLUTIONS 800X600 / 1024X768 / 1280X960 / 1600X1200
- - - - - - - - - - - - - - - -
LINK TO DOWNLOAD IMAGE (simple link to jpg)
CAR WALLPAPER IMAGE
- - - - - - - - - - - - - - - -

I really hope someone can help me get started.