Rosewicket Wicca Coven

So I was wondering. I'm Wicca, but the rest of my family celebrates Christian Holidays. Is there some rule that says I'm not aloud to celebrate these holidays with my family? I didn't think there was but I thought this might be a VERY important question to ask. I don't want to upset anyone in my family(or any of my friends) by saying that I can't celebrate thanksgiving or easter with them. They don't actually know that I'm Wicca yet, but when they do, I don't want to add on to the initial shock by giving up on all interaction with them...

I was also wondering about candles. I see a lot of candles being sold at witch supplies websites that are labeled specifically for luck or money or love, but do they have to be those candles specifically or can you use any colored candle?