Hi Maillet282;
Welcome to the forum.
That is an ambitious project for your inaugural smoke. Search the forum for smoking/cooking methods on how members smoke their briskets in the Bradley. There are several that are posted; such as Pachanga, and/or WesTexaSmoker are members that I can think of at the moment. If you follow Pachanga's recipe, the only suggestion I have is to reduce the smoke time to 4 - 5 hours, then continue to cook until done.
Since it is winter, search the forum for "cold weather" (using the quotes), to see how members deal with smoking during the cold. Others may be posting giving more specifics for cold weather smoking.