I actually figured something out. It's my eyes that cause me the issue, seeing if the subject is in focus, because with macro any little change takes the focus a long way one way or other.

Anyway, I found a button that instantly zooms in on the subject. I can use that to focus and actually take the image of that zoomed subject, or press the button again and it goes back to normal, but retains the focus for when I take the photo. It's like magic.

I twiddle the shutter speed and F-stops as well of course, depending on the available light.