Totally agree with others - focus on the small, cosy, moments of togetherness that are simple and easy to achieve at home, in the main. Those simple traditions will be remembered, and will become ever more meaningful because they’ll be built into the fabric of Christmases all through the years.
I’m Danish. We are generally mad about Christmas. December is the Christmas month and most people have many traditions that they (we) observe throughout December, some of which are common to pretty much everyone, and others will be specific things that each family have developed over the years.
They are not difficult to do. Here’s a selection of just a few to get you started
*Advent - each of the 4 Sundays leading up to Christmas is marked with lighting an advent candle (one for each week), having a drink and/or a treat, and sometimes opening a very small gift
*Daily calendar of Christmas themed surprises: home-based activities/treats/baking (these calendars are usually handmade - often just some fabric bags or small stockings or little packages wrapped in paper, secured to a string or branch and hung on the wall. The children can take turns opening them daily)
*A calendar candle is lit every morning during breakfast or every evening during dinner, counting down the days
*Chocolate advent calendar (of course!) or one of the paper ones that open to show a Christmas scene, or, if you’re willing to spend a bit more, a toy calendar each such as Lego (or whatever)
*Getting to pick one new bauble or ornament each for the tree
*Unpacking the decorations, helping to put them up
*Writing and posting (or delivering) cards
*Making a gingerbread house
*A family Christmas Eve box - new pyjamas, a Christmas book, a DVD to watch, hot chocolate with a candy cane to stir into it, empty stockings to hang on the fireplace or the door handle of their room before they go to bed
There are loads more.