GOING BACK TO SCHOOL !

I would like to go back to school in 2012 to understand more about building websites I know a little but I would like to be clued up on all aspects I can build a site but it basic there is so many different coding  and I just don't get it. I don't know if to go to school or to do a online course I am going to spend the day look at online course to see if it right for me but if any one who reads this blog have done any online course and have any advice for me and all who will read this blog please comment