Whats your ultimate goal? Design? Don't do design unless you're really good. I'd go for programming IE Scripting.
It sounds like you want to focus more on website related stuff.
Either way you have to start with HTML first.
You can learn by going here.
http://www.w3schools.com/
HTLM ->
http://www.w3schools.com/html/default.asp
Start with that. You can just do it locally and open the file using your browser.
Once you get better you can move up the ladder. I don't recommend javascript first.. you will get confused and it will make the learning miserable.
I have video lectures of stuff like that if you want to learn, especially php. But its up to you. I've seen too many people give up after a few days. You really got to enjoy the stuff before you can really do it.
Its definitely worth it to see if you have the patience for it.
Let me know how it goes for you.