You are going to have a lot of fun! I remember my first and it was nice to finally socialize with people...thats my favorite part. I remember being escorted out of the room for birthdays and holidays back in elementary school and if we ever ate the cupcakes the teacher would rat out my sister and I!! I started going 5 years ago and I did feel a little guilty, but I still do sometimes. The whole experiance is really hard to shake from my mind.
I love the holidays and I don't place any religous value on them at all, I love to see my "pagan" family that I has no ties with as a child because of the org.