Create a slideshow

Hi, I’m trying to create my first Wp Template but I’m a self-made programmer (it means that my knowledge of PHP and stuff like this is almost 0 😛 ) anyway I almost did everything the only thing I can’t find (and it’s 2 months that I’m googling…) is a good tutorial that teaches me how to add a slideshow (NO PLUGIN) to my new template…

I would like this slideshow to automagically catch the first image of each post and show so if I click on the image it links to the post…
No way to find …. is there anyone who can teach me how to do it?
I placed also a few bids on Fiverr but I had only 2 answers and no one solved my problem!

Actually to “catch” the first image of each post I use this:

//A different way to show thumbnails
function getImage($num) {
global $more;
$more = 1;
$link = get_permalink();
$title = get_the_title ();
$content = get_the_content();
$count = substr_count($content, ‘<img’);
$start = 0;
for($i=1;$i<=$count;$i++) {
$imgBeg = strpos($content, ‘<img’, $start);
$post = substr($content, $imgBeg);
$imgEnd = strpos($post, ‘>’);
$postOutput = substr($post, 0, $imgEnd+1);
$postOutput = preg_replace(‘/width=”([0-9]*)” height=”([0-9]*)”/’, ‘/width=”50px″ height=”50px″/’,$postOutput);
$image[$i] = $postOutput;
$start=$imgEnd+1;
}
if(stristr($image[$num],'<img’)) { echo ‘‘.$image[$num].”“; }
$more = 0;
}

Then when I need to show the image I have to write this:
<?php getImage(‘1’); ?>
and it works 🙂

Suggestions? Prays? Blames?
Could someone please help me?
Thanks a lot!

If someone want to take a look to the template I’m creating here is an example: http://test.downloadtaky.info/
There is a slideshow but it doesn’t work as I wish…
Thanks once again!