It's an OK image. It's a bit flat. Looks like a nice location. I'm guessing this was a grey day as there are few shadows. I would go back and try again with better light - maybe a misty with morning with light streaming through the trees.
The framing seems off. I would try to get the whole tree next time as opposed to cutting off the top.
The focus is sharpest on the water/ice so my eye is drawn to that. The trees pull me back, but they are a bit on the soft side. I guess I'm struggling a bit as to what the subject of this shot is - where I should focus my attention.
The mono conversion seems fine given what you were working with - sometimes (often?) more color creates better B&W. This scene was probably almost mono as a color image, so it really needed some contrast/shadows etc. to make it pop.
I think this is a good start to exploring this location and what it might have to offer in differing times of day and light.