Hi Izzie! I completely agree with John. This one may not be the best choice for a conversion.
IMO, bumping the saturation a bit can often help when you start to convert, but it may not be necessary to push it quite so much. But, if you plan to ONLY have a BW final, then in most cases it may not hurt either. When I am converting I usually keep in mind that I would like to have a nice color version of the shot also, but I have been known to oversaturate. I try not to so much now. What can I say? I like bright, vivid colors.
I grabbed your straightened version and did a quick and dirty conversion myself. Again, it's pretty busy overall but see what you think.
First, I used ColorEfex. I have a crazy amount of recipes set up, but I started from scratch here. Here are the filters I stacked for this round"
1. Detail Extraction - I boosted the extractor slider to 28%, contrast to 17%, and pulled saturation to 0%
2. Foliage - Method 3, Enhance 84%
3. Pro Contrast - Color cast and Dynamic set to 0, Contrast (middle slider) set to 18%
4. Darken/Lighten Center - Round shape, Center luminosity 0, Border Luminosity -70, Center size 85. I then placed the center between the top and bottom doors, right at the floor of the deck.
Then I clicked "ok" run the filter.
On the new layer output by ColorEfex, I then ran SilverEfex. Posting a screenshot of those settings here. I only used the "global adjustments".
And finally I applied a small amount of USM to the converted image. Since it was a small version from the post, I only applied amount: 25 with a radius of 1.0