Ask Americans on MN OP! Though it depends on which part of the US you want to emulate. Traditions will vary pretty wildly in different parts of the country.
I'm in middle Tennessee.
Yes to overdone Christmas decorations, it takes me days to get it all up, and the storage of it all the other 11 months of the year takes up our entire attic. I have crates of lights for round the windows, a wreath on every door, three trees, lots of garland for over doors and fireplace. Festive knick knacks galore for shelves. I even have a Christmas cover for my mailbox and a snowman shower curtain... DH says I need help. This is probably true 
I have done cookie exchanges in previous years (though due to covid, not this year) snickerdoodles, sugar cookies, and peanut butter stuffed chocolate cookies tend to go down the best in my family.
Pumpkin pie doesn't even make a Thanksgiving appearance for us, let alone at Christmas, as nobody I know particularly loves it and everyone would much rather have the other festive favorite - pecan pie. I also make a spiced bundt cake with brown sugar frosting for both Thanksgiving and Christmas which goes down well especially with the kids.
For Christmas dinner we have both turkey and ham, mashed potatoes, rice pilaf, cornbread dressing, green beans Amandine, sweet potato casserole, mac n cheese, roasted carrot/turnip/parsnip/onion, caramelized shallots, biscuits and yeast rolls.
Drinks tend to be sparkling blush wines, cranberry juice cocktails, mimosas, sweet ice tea, and yes, hot chocolate and Eggnog.
Hungry now...