Sunsets can be VERY tough...the sunset itself is often beautiful. The trick is to get a ***good*** foreground object into the shot; an item or person or "thing" that will add, and not detract. Many times people shoot a sunset with absolutely nothing in the foreground, and all it ends up being is a pretty sky and some black stuff. YOU CHOSE a large tree...not too bad a choice, really. It's the most-interesting close object I can see in the photo, and it was rendered large, and nicely silhouetted. I'd say crop or clone out the leaning pole on the left, and it's not too bad overall...not "great", but actually BETTER than say, 75% of plain, no-object sunsets. The TREE itself is actually a pretty powerful "icon"...so I might have taken steps to have made it render larger and more-dominant in the composition, by going closer to it, and then using a shorter focal length to make the tree really BIG in the frame, and show the sunset as the background to the tree, dominating the frame. People shoot sunsets, all the time. I will shoot them as memories. I like them. The ones that stand out to me usually have a really GOOD foreground object.
The young woman...the shot has a background that steals from her, and the missing swing chain on the left....ehhh....mentally I REALLY WANT to see that other chain!!! But more importantly, see is looking OUT of the frame...that's not working as well as if she had been given more space to "look into". What is called "her line of gaze" or "her eye direction" needs to be a big part of the shot...so, unless this was shot much "looser" and you cropped in to get this, this particular frame is going to be hard to improve., OTOH, if you shot this "loose", and have more frame to work with, you could make it a better picture of her sitting in a swing. STILL, you could ALSO CROP IN REALLY TIGHT, and make this a headshot...and that would be an "okay" picture too--better than this particular composition.