Have you learned the techniques for timberframing? Do you know how to use a framing chisel? What do you have for a mallet? I knew nothing a year ago, but after taking an intro class where we built a timberframe, cutting all the joints, I leaned a ton. I learned a lot that I would not have derived from any book. Do you know how to layout and the different techniques for laying out. Do you know how to layout with a razor knife and use the razor line to rest your chisel on the final facing of a joint. I just recommended this in another forum and I'll recommend it to you. Take a class. It will be very beneficial to you. It was worth every penny to me and will save me tons of time and money while building mine. I took my class at foxmaple.com last June. There was another class in Tennessee early in the sping which I was too late to sign up for. Might be an option for you if you don't want to wait. I would also recommend two blogs to you:
http://massiehouse.blogspot.com/
http://tysonsdaily.blogspot.com/2007/05/timberframe-barnshop.html