My only complaints are regarding the background. There is a yacht peeking out behind the subject boat and the ferry in the background is not very pretty.
I wanted to be close to the edge so that I would include the water line of the boat in the photo. Otherwise I could have moved further to the left in order to hide the yacht thingy.
I wish my lens would be able to open up wider (if I've understood aperture correctly..?) to create a blurrier background. Lowest I can do with my kit lens is 3.5f and that is if I don't use any zoom at all.
Any other advice?
Interesting shot, worth the taking.
Have you tried looking at a black & white version? There's so little colour present, it may work well.
The yacht doesn't worry me, but I do wonder if the right hand side can be bought in a little - the cut off boat adds little, though the Stena Line Ferry(?) and tall building do seem right for the composition.
I suspect at these sort of distances you would still not blur much of the background even at F1.8 aperture - you would want to be much closer to the subject (and here, lose the composition). I'm out of my depth (Hah!) in this, but various online tools should give you the start and finish of the depth of field at this sort of distance for your lens and camera, and you obviously want things to be blurred to be a long way (proportionally) out of that range. https://www.photopills.com/articles/depth-of-field-guide might be a place to start, but there may well be better, or better suited to you.