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Well brother .. you should first try different falvours of development platforms like c# for asp.net , php , python or other open source scripts like wordpress , magento or drupal.
Well , I sugguest start with basic html/css to get idea how web site build from front end [w3schools.com best resource] then next step would be back end development which we call server side scripting you can go with php or .net for php you have best books in market from author Larry Ullman and for .net there big resource available on net like msdn.
And for UI prespective Jquery and other tools you need to learn side by side.
Regards