*sigh* well, here we go. might as well spew out my version of what pr1mate said.
i'm going to set you on solid ground here and now. trackers (which are chiptune programs with interfaces, bluntly put, resembling Famitracker) and other DAWs (which stands for Digital Audio Workstations, by the way) will take a while to learn, but honestly everything really depends on what you're willing to use and what you're willing to lose. some of us spend thousands of <your native country's monetary units> and hours working.
first of all, trackers are very logical and very mathematical. you won't get away with using right brain and right brain alone when you're making chiptunes, so no matter what, you've got to put some real, logical thought into it while you're working. and if you're really ready to get into this, then get ready for some long hours slaving over a computer program, because chipmusic isn't good at being spontaneous. it WILL require you to be patient and it WILL require you to piece every last note of what you make together, unlike with guitars and instruments you can just pick up and play; you'll be hard-pressed to just pick up a gameboy, NES, etc. and play it. ...wait, what?
let's just show you your entry-level options, at the least for learning how to work a tracker system:
famitracker - A.K.A. 'the easy route'. famitracker is pretty much the jack-of-all-trades beginner's tool for chipmusic. its native console is the nintendo entertainment system. it's quick, it's easy and it can provide a wide range of results. although everyone's pointing you to famitracker, i honestly don't reccommend it. it's not really a tool that's easy for people to naturally comprehend and learn quickly with. here's a rule of thumb: if you don't/didn't make high marks in math, you may want to try using something else.
sunvox - although sunvox isn't actually a real CHIPTUNE-PRODUCING system, it is a tracker, and if you just read up a little bit on it, it's deceptively easy to use and a good choice for beginners just figuring out how to work the system. it's my personal favorite for learning how to work with a tracker/chiptune DAW, and it's how i got to the skill level i did. you may or may not thank me later.
LSDJ (emulated) - i'm about to get killed for trying to throw a newbie into this headfirst, aren't i? LSDJ is the "industry standard" of chiptunes. it's generally run on a Gameboy, and with that, let me just warn you now that this isn't the best choice for beginners. LSDJ is hard to navigate with the few controls that are available to it, it'll be even harder to navigate using an emulator, the full version actually costs money (oh no, oh no, i might have to pay two dollars), and the Gameboy's hardware can cause severe limitation. but my god, once you learn how to spam BRK-i mean, effectively work LSDJ's complex system, you will get better fast. i'd still only take this option if you have the balls of a rhino, a lot of extra free time, some real determination and a metric f-ton of ritalin.
seriously, weigh your options if you really want to get into this. if you have any questions in the means of beginner tracking, feel free to PM me and i'll see what i can do to help you out.