The basic answer is No. the longer and more applicable answer is: if you have to ask how you don't have the knowledge required to do so. Internet security is a very very complex group of systems. People spend years of education learning the basics of internet security and its not something you can just do in a few hours.
If you start now i bet you can change your marks by 2018 :-) I don't pretend to know how to hack into a computer system, but I am relatively familiar with the guts of the internet.
anyhow Best of luck with your "JUST FOR FUN" hacking project... lol :-)