I've been trying to learn depth of field and thought taking some photos of plants would help validate some technical basics.

I'm shooting in a variety of modes, but trying to stay within Manual settings, toying with aperture. Am I correct that as I dial aperture from f.17 to f8, for instance, I'm using less light, but reaching higher depth of field.

Am I wrong that when my aperture is small, its as if I'm "sniping" my subject with a cone of moreso in-focus, higher details?

And as I increase the aperture, I'm broadening and flattening this cone of high-detail capture?

Am I understanding this correctly?

I'll post some examples I've recently taken with an LX100, some with a tripod, some without.