Christmas is a time for families to be together and show the spirit of love and caring. I was not a JW child, and I loved Christmas! I still do.
I understand your frustration with it because of all the work and preparation a lot of people get into. All of that is not necessary. If you don't want a tree and don't want to decorate it, there's nothing wrong with that. Just tell the family you are inexperienced and don't know how.
Gifts do not have to be extravagant either. I usually give homemade gifts. People always will need food, so food is a great gift. I read an article about a woman who cooked dinner for the entire family as her gift. I do not spend a lot of money on gifts if I buy them. I find things on sale all year round and put them in a box, and start wrapping in November.
Relax and enjoy the holiday. If you don't want to attach religious significance to it, that is certainly acceptable as well. Make it fun and not stressful.
I hope you enjoy the upcoming holidays, whether or not you do anything special to celebrate.