The light and the composition are very nice. Well done. As you point out, you don't have a lot of posing experience (and neither do I) but that's the only thing in this image that I think could use some improvement. For me... and I mean for me, your taste may be different, I look at this photo and it feels posed. I want an image that feels natural like you captured the scene without posing. I have yet to figure out how to do that in any way other than capturing candid image or by working with models who have tons of experience looking comfortable.

Overall, job well done. Keep working at it, I look forward to seeing some future efforts.