Welcome to the madhouse that we call the DB Boards. I am so very sorry you have found yourself here. There is a lot of love and support here and you will find good people, helping other good people.
Strap yourself in because you are in for a bumpy ride. It can be painful and overwhelming, but the rewards from this journey are huge. I'm not sure if you were a lurker before posting. Some of us were so learned the DB lingo before posting.
You will hear alot about GAL - Get a Life, doing a 180's, NC - no contact, LRT- Last resort technique, and detaching and boundaries, and validation.
Read and study everything that has Cadet has provided for you for homework. There's gold there.
What ever you are expecting from DBing, it will not happen overnight. This journey is one of saving yourself yourself, so you MIGHT, save your marriage.
My journey here is different from other's but I have a huge respect for the people here and MWD's work. This journey will be transformational if you let it.
There are vets (who know Dbing like the back of their hand) and other posters with experiences in number of sitches that marriages go through. Let them be your guides.
Expect to be challenged like never before. Remember kindness can be cruel at times, so expect a 2 x 4 every now then, when someone sees you falling in the same hole over and over again.
So you get the most from the board, keep posting regularly, I mean like frequently. It will allow others to get to know you and your sitch. Post on other people's there, if you have no advice to offer, offer support. Giving to other's allows for two things, 1. It FEELS GOOD and 2. You personally gain insight when you provide other's with advice, information and empathy.
Again Tim sorry you are here, but welcome to journey of a life time.