My first Thanksgiving in the drivers seat!

So, I just volunteered myself to make Thanksgiving dinner this coming Sunday for my husband's side of the family. YIKES! I'm fairly confident that I'll be able to pull it off as I absolutely love to cook, but I've never made a turkey before! And... gravy was never one of my strong points. Does anyone have any advice to offer in that area? Please?? Also, I'm curious to hear what everyone's favorite side dish is. We're having mashed potatoes and stuffing, and I'm used to my favorite green bean casserole, but my husband hates green bean casserole and so does his sister. I figured I'd start searching now for the perfect alternative. I'm hoping that someone will have the perfect suggestion for me!