From what I've read, you will have better results shooting in color and converting the image in software. Has to do with the tones that convert to shades of gray, I believe, plus you have other controls.

I'm not a portrait photographer, but I think some will mention that your shot here is not successful because the girl's face is in shadow. And looks like the harsh light might make the exposure difficult in either b&w or color.

Some scenes are not really suited for b&w. You might want to use Google images, or other source, to check out some b&w and determine what stands out for you: often it's shapes, shadows, textures, simplicity of composition, and dramatic light - in a good way :)

Since you're just starting out, read or watch videos about composition and exposure. You will pick up lots of pointers, no matter what area or technique you are interested in.

Photography is a joyous hobby; enjoy the journey :thumbup: