So from wat people are telling me here (Please correct me if i am wrong) a good development path would be:

Javascript, Ajax, and then realistically its going to be between PHP and PERL.

Benefits being that Javascript will add alot more user interaction and make a more user friendly site, AJAX, i would like someone to really explain what the benefit of me using it is, and what i would use it for, and then with the PERL and PHP, they would be the serverside scripting languages that i would use to actually do something with the data that i would require users to put into a site.

So my new question is really, Why would i use AJAX? And also, if i was to get a forum code such as SMF, is it going to be easy enough to customize the code to my needs and liking (Not talking just along the lines of the themes, talking in full, to make it something different).

Thanks for the continued help guys! Been spotting up on my different HTML and CSS tricks and getting them down whilst i learn what i really am going to do next

I've never coded for AJAX, but from what I can understand, it allows you to make updates to a page without actually refreshing the whole page. i.e. you can change the data on a web page in real time. (Someone correct me if I'm wrong).

I would stick to just HTML5, CSS, PHP, and JS for now.
You could even skip JS for most of it.

I really only use JS for sliding images or scroll to top animations, etc. (This can all be added AFTER you have a functional website with PHP)

you will need to know a serverside language before you can ajax
ajax basically sends and retrieves data from the database without reloading the page.

Simple and easy explanation that puts me in my place, awesome, thanks