Welcome to the insanity....

Building a flyable airplane isn't very difficult. Get something like a Sig LT40 or a Goldberg Eagle 2 (Both are available in kit and ARF formats) and you'll find the manuals and instructions are aimed at the beginners.

As for web sites on how to build, I can't help you, but the forums here have a wealth of information. One suggestion I have would be to contact a local club and ask if there is anyone who can help you out.

I found I learned a lot more by "holding the flashlight" than I did by reading books etc... so perhaps you could ask if there is anyone building anything at the moment and if you could "assist" them. An extra set of hands are always useful!

You might be able to borrow the instructions for a trainer airplane and have a read through them. Once you've done that, you'll see it's not that hard as long as you're patient and read the directions two steps ahead twice (at least)!

Edit;Correct spelling mistrake