Brian (*longfella) has documented, very well I might add, his recent build in this thread. It drifts off topic at times but otherwise he led us on his amazing journey. There are many things to copy that he did. His build involves a body from a different maker but it will have many similarities.
Also, Alan (drclock) is our resident expert Speedster builder so he is a remarkable asset. Since you already signed up as a "Supporting Member" it shows you are committed to the process. There are many valuable resources available in the "Resource Library" and as a SM you have access to that.
Welcome to the Madness! Don't ask what it means but give it just a little bit of time and you'll understand.