Hey,
I haven't planned my funeral. If i died, i wouldn't want anyone to find me. I wouldn't want anyone to even realise that I'm dead.
Why haven't you told anyone about your plans? I think talking about it'd give you some relieve.
Oh, and, I don't think that it's "too early" to plan your funeral. I just think it shows how much you're hurting.
Hang in there. We'll all be better one day, right?