"I would appreciate comments on how to improve my effort at landscape photography."
A lot depends on what your intention is with this photo. If you are trying portray the area as dark, mystifying and edgy, then you've done it. The photo overall is on the "dark side" with most tones being middle to low values.
However, it your intent was to create an uplifting and brilliant portrait of a beautiful area, then this photo doesn't convey that due to the decisions you made in processing.