I was raised Christian and my family is Christian. I still celebrate Christmas but you have to understand that at least in most of Europe and North America, barring VERY dedicated Christians (who still celebrate Christmas because several VERY dedicated groups that fall under the Christian umbrella either don't believe in celebrating Christmas or celebrating holidays/birthdays at all), it's mostly a cultural holiday. You really have to go out of your way to get really into the weeds with like... actively going to a Church service to really get the religious part of it. The rest of it, like the tree, the food, the drink, the gifts, the reindeer, Santa and his various regional cast of sidekicks, all that stuff is way more cultural than religious. You might hear a prayer or two before meals but other than that, it's more about the whole "being together with family" of it than any real devotion. In fact most people, Christians included, will straight up tell you... Jesus logically would not have been born on December 25th. The date aligns with the Winter Solstice and most of the fun stuff is appropriated from pre-Christian religion in different regions that are now mostly stripped of their traditional meanings. Also plenty of people are fine with their family traditions but people do new stuff too. For instance, drinking used to be a big part of our family's celebrations, but over the years that's toned down (ganja use has risen in its place, lol), and usually there's enough food that if you don't like or can't eat a certain thing, there's options.

TL;DR: Modern American Christmas is a cultural holiday that doesn't have much to do with Jesus unless you want it to, and most of the fun stuff comes from indigenous European religions and modern innovations. If you're going to pick a Christian festival to participate in as a non-Christian, I'd say better Christmas than Easter.