Hello and welcome to LinuxQuestions,
You can learn everything you want to learn about something even if you have no idea at all. LinuxQuestions however is not the place to come to if you're looking for installation guides. Those can be found in abundant numbers on the internet. When you follow one of the guides from the internet and encounter problems, that's when you turn to LQ for answers. That exactly is when you'll find us at our best. Some starting points, read the links below to get a first idea about the differences between Linux and Windows (since that seems to be what you're using).
Linux is not Windows
FAQ for Linux newbies
After that go over to Distrowatch.com
to get an idea of what's available and download some newbie friendly distributions like Linux Mint or one of the *buntus. Most of them are LiveCDs so you can just boot from them and get a first feel without even installing anything to harddisk. This also gives you the advantage to check if your hardware is supported by that distribution.
Once you've made a choice on what you'll be installing, search Google for installation guides.
Looking forward to your participation in the forums. Have fun with Linux.