Good work from all concerned.
I like the way we can't see the 'floor', it could be a hundred feet up. Maybe too many movies...

There is a tendency to oversharpen when the image is not crisply captured in the first place. This only exacerbates the problem.

You were pushing the limits, mostly in terms of shutter speed, though there's nothing wrong with that as some situations do require you to do that. The situation and the moment deem you need to get a shot, so don't say 'I won't try as I may mess it up' as then you won't get a shot and won't know if it would have worked.
Take several shots though, just to improve your chances of a good capture.

Technical issues aside you have framed this very nicely and your timing is spot on. Those are two aspects that are often harder to get right than the technical aspects.

Just elaborating on John's softbox suggestion.
By turning the softbox away from facing directly at the model rather than the square light source you'll get a narrower and narrower (the more you turn it away) rectangular source, as seen by the model.
That will provide the characteristics of a small directional light source, ideal for mood and shadows.
You're effectively using the light spilling out of the sides,so you may need to increase power output or open up the lens a little in order to compensate.

It's worth spending time to get the right angle that you're happy with - it means a shot you'll be proud of rather than thinking 'but if'.

I agree about the hand, though it's fine for the family record, indeed better than many a family album shot.

A late welcome from me too.

The others have covered it.

But I must say it's good to have a reply and that you appreciate the comments. Not everyone has a dialog so it's nice to see we've been of some help.
Let's see some more of your work

Can't agree more

V7 for me Isabel