install a open source os.
read. code. read some more. code some more.
(sure.. you can learn on windows, its just, well slow.)
unless you mean hacker in the pop media sense...
dont even bother. by merely asking youve proven yourself most likely incapable.
you could become a script kiddie though, but if thats the case then if i ever meet you, you had better hope you can run faster then me ;\