I am no expert , but will just give ya my opinion (and thats all it it, my opinion).
The 1st is nice but possibly a bit on the dark side. Find it hard to make out the hair from the background and her eyes are amazing, but i think more light would have brought them out more.
the 2nd seems a bit brighter but the model is a little squared towards the camera, maybe next time have her body turned at an angle away from camera, but think this is the best of the 3.
I really dont like the 3rd( sorry). Far too bright and her face is very burnt out.
as i say its only my opinion and for what its worth, its pretty good for your 1st time.
cheers, Sirvad.
In addition, I’m getting a slightly odd feeling from your model,
as if perhaps she wasn’t completely relaxed-
there seems to be a tension in her features,
particularly in the first and third…
The second is probably the best of these,
but the lighting doesn’t really take account of her hair hiding most of her face-
maybe not completely your fault,
but definitely your problem…
Your light seems quite hard, quite a small source,
and a more elevated position might have been a bit better,
and perhaps some fill on the far side, a reflector maybe…
The background does appear to be lit,
but as sirvad mentioned, could perhaps have been lit a little more…
Good first go, and assured looking pix too, for all I’ve said-