This is very nice, especially for a first attempt.
You might be aware that there are two fundamental approaches to B&W photography -- employing the full tonal range from deep blacks to bright whites that also displays considerable mid-tone contrast or doing pretty much the opposite. Your very nice rendition is the latter approach. If that's by design, that's fine. If not, adjust your levels and curve to render the image in a style that is closer to the former approach and determine which style you like best with this particular image. However, keep in mind that you might prefer some images created using one style and that you might prefer other images using the other style.
Most important, hopefully you're aware that making monochrome images can very easily become addictive.