Lovley FG swirl there, works well in mono giving an almost fine art feel. The sky patterns are nicely complimentary too and so I can see why you have included so much of it. There's plenty of contrast in the falls so they haven't just become a milky mess. It's really well done and on a new camera too I see, congratulations!
Will be expecting great things now
If I had one wee point, it would be the level of the river slopes down to the right which is probably just lens distortion and me being picky in an otherwise great image! I suspect a wee tweak of distortion correction or keystone tool would fix this in a jiffy