Although I think this shot works better in colour (and a fine shot it is too), the conversion you have made looks good to me. It takes a while to start to see how tones will render in B&W and understanding the impact of filters will help (and I'm sure it will be covered in the course). Strong compositional elements and shape play a very important role and often simpler scenes will work better. In the immortal words of Douglas Adams, "Don't Panic".