Don't undersell yourself. I think you're on the right track.
But you asked, so...
I usually prefer a wide aperture, so rather f/2.8 than f/8 (but stopped down sufficiently to get at least one flower entirely in focus). If too much is in focus the whole frame becomes very busy, and you also get a better sense of depth with less in focus.
The usual "rules" goes her as elsewhere for composition and where to put the elements in focus. Usually I prefer to have the in-focus elements somewhere around the thirds (like you have here). If they are dead centre the image tends to look more static (which, of course, can be what you want at times).
To make things simple I try to think of two things whenever I take a picture:
- What in the frame do I want the viewer to see first and foremost?
- Are there unwanted elements in the frame? (And how can I exclude them?)
I, too, find the oof blob bottom right a bit distracting as it partly covers the elements that my eye is drawn to.
Aslyfox' suggestion is a good one. And when you see an image you like, try to figure out
why you like it. If you find it hard, try to describe to yourself what you see - "The in-focus flowers are placed so and so in the frame, this flower is more lit, that part of the frame is in shade, that flower's stem comes into the frame from the corner, etc". At least for me it helps noticing each element and what it does for the image.