Magic Forums

I'm currently living in a household where magick isn't fully understood and appreciated by the ppl I'm living with. Whenever I bring home witchcraft books or head strait for the Occult section of the local bookstore, I recieve critical, disapproving looks & annoying comments. It gets even worse when I want to buy spell ingredients or candles. Today I found two really pretty unused candles in the back of the cabinent & asked my adopted parents if I could use them. They gave me the same ordeal & told me that I had to tell them whenever I was gonna light the candles for a "fire saftey procaution". I understand their concerns, but how can I possibly say, "Hey, I'm gonna light my candles now...& please don't disturb me while I do cuz I'll be doing witchcraft & need peace & quiet." without concerning them?
I love magick, & it is a large part of my life. But how am I supposed to practice when these people r so upset by what I am doing? & it's not like I can move out... I'm still only 14. It doesn't feel fair to me though. They aren't even my biological parents. Does anyone have some advice for me?