Work on the computer and figure out what does what. Such as on a Mac computer what happen when you hit a picture with two fingers on the trackpad. If you have a friend who likes fiddling with machines, feel free to ask him/her for tips or explanations on certain components on the computer you are wondering about, such as how they work.
Go to the Internet and type in something on Google like "computers for beginners" or go to a store and buy the book "Computers for Dummies".
Experiment with what you know and thus learn what you don't know.
Study computer languages such as C++ and Python. These languages will help you making programs and websites.
Go to a computer institute and sign in to learn things that will help you such as the ISDL and other great things.
* Following the above requires lot of effort and passsion. Obviously, Nothing can be attained unless an effort is made.