1st focus stack - C&C welcome

I'm not sure if this is the right forum. Apologies if not.

I've been meaning to try focus stacking for ages and here's my first effort. Camera on a manual focussing rail and Zerene Stacker with everything at default. Stack of 30 photos.

As I'm just starting out, comments about obvious problems or what to try next would be very welcome. I'm aware of the artefacts with the leaf/flower that runs behind between the leaf and dead flower. The subject was chosen just to try out focus stacking, so no need to comment on the composition unless it's relevant to focus stacking.

Thanks for your help!

Here's the finished article:

This is the front of the stack:

And this the back: