Have you heard any MP claim that they have read Theresa May’s withdrawal agreement? Have a look here. How many pages can you read before you loose the will to live. How likely do you think it is that your MP has read it? I am not expecting you to read it but do have a little look. This is the legal document between the Britain and Europe. If you want to have a more digestible overview then look here.
Remember that the withdrawal agreement is just a small part of the whole process. The big decisions have yet to be made and could take many years.
If you would like to have a peek at the political declaration for the basis of the future relationship between Britain and Europe then look here. This is not a legal document, purley an aspiration. It is well to remember that we would have left if we are negotiating this framework. Therefore we will be in a much weaker position because Europe is far bigger than we are. This declaration is is the best we can get and, if it comes to this, the deals will be far worse. If you want to have a more digestible overview then look here.