[Advice For this Macro photo.]

I agree with unni.  At least F8.  With todays cameras you can also raise the ISO.  If you use a flash try under exposing it by at least one stop.  That will bring out the color and detail and the flash won't overwhelm the picture.  Also tripod is a big help for Macro Photography. Hope that helps and be proud, your picture is great.

[Request Affinity Designer for iPad]

And have it sync with Affinity Designer.  If this happens I would say you have almost the perfect App.