Fresh meat! Haha JK. Welcome to the 405th! first off let's get you familiar with some lingo we use around here. First off, there aren't any real "bluebrints" for making armor. The most common form of starting armor is called Pepakura, which is a paper crafting software in which you print out sheets of a heavy type of paper (cardstock or cereal box cardboard) and you fold and glue together to form the basic shape. these "Pep" files can be found all around the site, and theres is a (slowly getting outdated) Pepakura wiki which has a ton of downloadable files. you will need to aquire Pepakura designer from their website, but be informed, you cannot save files without buying it, so if you want to record sizes and such, you will just have to write them down or buy the thing (its a free download and works fine without buying)
Other then that all i can say is watch Adam's introduction videos and read the stickies. it may seem like a lot, but it is nothing compared to haveing a set of real life halo armor. AND REMEMBER! dont lose motivation!
-Fox