I was raised christian, by only slightly religious parents, and hated it.
I was taught christian values at school and like Noctem found no sense in the teachings because they had no relationship to what I could see happening in the world in the name of religion. Greed, killing, lies, hypocrisy, all seemed to be regular occurances in the news, all related to religion in various ways. I didn't want to play any part in that. The God my parents and grandparents believed in just didn't seem to exist any more.
I started loking for a new way when I hit college, and there were plenty of different ones to choose from there. Wiccan seemed the right one for me.
I would never have told my parents then, and still wouldn't tell my grandparents now (if they had been alive now) as they would have been very disappointed in me. Having partially 'confessed my sins', my parents are OK with the wiccan part of it, though the Vampire part of it stays safely under wraps for now, and my kids are OK will all of it, but they've been warned not to say anything to anyone about any of it.
I am still trying to fudge the idea of the Goddess into the idea of The Source and make it fit neatly together. So I can't really shed any light on that bit of my beliefs. It's not quite there yet

but I'm working on it.

terri, no one likes to think of their loved ones in the ground, I have lost both my grandparents, so I sympathise with you.
It helped me to think of them as ascended either to a better place or at least as partial conciousness of a greater whole. Whether I call it Goddess or Source, it still means that the essential part of them continues in some form, and the only part that is in the ground is their old set of clothes that they dont need anymore. After all when you move to the caribbean, you don't take your raincoat and winter woolies with you do you? You leave them behind and take only the flimsiest of apparel for the warm summery place you're going to. The old clothes are buried to keep the planet tidy, and the owners move on and forget about them. I try hard remember the people I have lost and the energy they had, and not worry too much about what is happening to their old clothes.

The respect you show your grandmother does you credit. You sound like an excellent daughter and granddaughter.