The OP needn't apologize! These are good. Your success rate is good, closeup or macro is difficult, even for seemingly immobile flowers - always some !#$@#$@#$#$% little breeze at the wrong time.
Herewith some musings from my closeup/macro "adventures."
For flowers and that sort, I feel a tripod is essential, along with a cable release (you can see I started out in film). I'd suggest a tripod without the struts linking the legs to the center post; you want to be able to splay the legs independently. Get one which will let you "get down and dirty" Gotta be willing to sit or even sprawl on the ground. Along with that a right angle finder is nice if your screen won't twist and tilt, those on my Pentaxes won't. I won't get into the ball head vs 3 axes controversy; for my use in closeup/macro shooting the 3 axis does the job. Don't want things flopping all over the place!
With tripods you have to balance: Sturdy. Compact. Cheap. I've never seen one with all three attributes. Used is good here.
A focus rail is worthy. Here're some examples: focus rack - Google Search I have one of the $ 40.00 varieties, adequate to my needs. These gems let you adjust your camera position within limits without moving the tripod. Only disadvantage is that they raise the camera's height. If you use one of these be careful flopping the head for a vertical, you might overbalance things.
Our friend from Sweden had some good points on lighting. Often a high overcast is the best lighting without supplemental lights or diffusers.
For butterflies and such size critters I've found the 18-55 Pentax kit lens is often adequate. It focuses pretty close; I set the autofocus to allow the shutter to release only when focus is achieved. I then focus by moving the camera. I also have a Vivitar 100 f3.5 macro for moving closer. Its manual focus, so I use the same "catch focus" technique as above.
The Vivitar is a true "plastic fantastic." Build quality is only adequate, but the results are excellent. Ratio is 1:2 continuous focus, 1:1 with the furnished achromat closeup lens. Mine new was about $100, I don't think its available new now. An inexpensive intro to macro formerly available in MF or Autofocus.
Depth of field? Ain't much, as you already know. There is focus stacking for which a focus rail and a stationary subject are essential. Otherwise stop down and take your lumps! Of course at the smallest stops diffraction rears its ugly fuzzy head.
And, course, patience.....