Well, since you're struggling to draw a Christmas tree, maybe you need some inspiration. Why don't you try looking at a few different pictures of Christmas trees online, and then try drawing your own version? You could also try using some reference materials, like a ruler or compass, to help you get the proportions right. And if you're still having trouble, don't forget to take breaks and give yourself some time to relax and let your mind wander. Remember, the best way to learn is through practice, so just keep at it and you'll get there eventually.