I´m Lara, 16 y/o, from Germany. I have been vegan for about three quarters of a year, still going strong

I really want to act on my beliefs of not believing in anything, but I am also trying to refrain from saddening my grandma. I know, thisw probably sounds effing childish, but she would be so sad if I would officially leave church. I am contemplating waiting until I´m 18, because then I would have to pay church taxes - Germany is so behind on some stuff, it is still interconnected with the "normal" taxes.
My grandma is a really open, non-homophibic, non-islamophobic christian and at her age I really do not see what harm she does. It makes her happy. And I love her so much


I honestly think, I should get my sh*t together and just resign (can you say that in english?), but would it be so bad to wait till I´m 18?
I´m normally not that spineless, but...
Feel free to give me a reality check - or correct my english. please be nice
