Hey, everyone, I figured I would get this in at the beginning. A site that has really, really great armouring resources is The Armour Archive. Go there. Bookmark it. Sign up for their forum. Read the posts, and post your own questions. I've learned a whole lot just from reading that forum, and the patterns they have (for most common European-style armours) are quite good as well.
People may give you crap for belonging to a LARP/boffer group, since many of the people on the forum are living history-types (who complain about the lack of realism in the SCA on almost a daily basis), but if you show that you're willing to learn and don't presume too much knowledge on your part, there shouldn't be any problems.