My Not-so-rebellious newbie friend, let's keep chatting.
You may not have experienced the hot/cold reaction yet, but then you have not made a concerted effort to go against the grain. As AlanF has described so well, you will experience the cold shoulder if they get any idea you will not be joining. An early comment an elderly JW woman gave me still gives me the shudders, "Don't worry, dear, you will get used to it." I had the strongest image of a songbird trapped in a golden cage. I wanted to claw my way out of the building right there. For that reason, I take your Mother-in-law's comment, "Don't expect too much of yourself too soon" in a competely different light. She wants you to go slow so that the indoctrination can completely kick in.
THERE IS A REASON they want you to go through the books slowly. THERE IS A METHOD to their madness. It takes about six months of this dragging, hypnotic pace for you to open your mind to just SUCK IN THE INFORMATION without questioning. The Watcthower society knows the rythm of conversion; if not by design, then it is a happy accident. They want you to slow down so you will STOP ASKING SO MANY QUESTIONS. By the way, your hubby's excuse that he has been "out of the truth" too long to adequately explain your questions is a cop-out. My hubby can't answer them either. He advises me to ask an elder. I tell him he is my spiritual head, the elders are not in authority over me, why would I ask them? I asked many similar questions to my study leader, and she quickly changed the subject. I am still waiting.
There is hope for a third way. Back out of your own involvement. Get yourself labelled as an "uninterested one" but not "opposing" your husband in his beliefs. Cut back in your meeting attendance 'till it drops to nearly zero. I go on nights my husband has an assigned part, that's it. As much as possible, provide alternative experiences for your children, and for non-meeting nights, for your husband. I hope and pray your husband lives up to his word, accepts you as you are, and gives up any rights to microphone handling.
So, you may have to face the loss of a child over the blood issue? Could you watch your husband die to honor his beliefs? Don't let your husband sit on the fence on this one. Make him think it through completely. By the way, if any JW-thinking interferes with the two of you in this matter, don't think you must abstain "because the bible says so". Blood is a symbol of life. Blood IS life, because, without it, we die. Jesus gave his blood for all. What is preventing me from donating my life-blood to save another? It is not like the recipient has to eat it.
Weird observation: Why do so many non-JW wives give themselves derogatory names when they sign in here? I am thinking of Worldly Wife, etc.