First, do you want to be dfed or not?
It sounds like you just want to finalize everything.
If you did go the email route, I'd say tell everyone you (if you haven't gone athiest route and still believe in God, etc) that you still do and you have discovered things that bother your conscience with jws. You can insert things like the lies on the website about not shunning those who leave, the deceptiveness of making it appear it's all bible based when everybody really does follow without question the GB, how you feel following the GB who say they aren't inspired feels like idolatry, whatever it was that got you out.
I'd also say you are fine not talking about anything bible related and still being just family.
When you meet w/ the elders, if you do, (I've met w/ them and told them everything and I am still not dfed), if you want to possibly be just considered inactive, then you'd have to show that you aren't spreading things. You can say you kept it all to yourself and only told parents. You can bring up the true submission to God brochure, showing how it's preached to others to examine their religion and beliefs, and according to the bible, it was hurting your conscience that you judge them to die at armageddon if they don't, yet you've never done it yourself.
Tell them you want to serve God, etc, you really need to know the scriptures and WT's, etc, and have on hand the 'public only' articles and materials for your side. For example the nobody should be made to chose between family and their beliefs, or the twisting/lies in the FAQ on jw.org, etc. The things they put in print that they don't practice, if confronted, they will have to either admit they are deceptive lies, or that it's true then they'll have to be lenient, very lenient with you.
In their own conscience they can't admit the WT lies, is deceptive, etc, so you can use their misleading and lies in print for your own advantage.
Anyway, I don't know what you know, what you want to do, etc, so too many variable for me to advise fully, but that's a little idea of the route I've gone for the time being.