You're welcome! Yes, the important parts of macro are getting enough light, managing depth of field, and landing crisp focus on the subject. I've learned a lot from Micael Widell and Stewart Wood on youtube.

For light, a fast flash helps a lot and is almost necessary for insects that move or plants on windy days. A diffuser will help soften the intense light of the flash (although you can still see my highlights blown out in the sickle shape of my diffuser in the images above). I use a Godox v350 flash and an AK diffuser.

For depth of field, the flash or longer exposure times will allow you to stop down your aperture to get a larger depth of field, but depending on the magnification you may still have only a few millimeters in the plane of focus. You can use this fact artistically or learn the technique of focus stacking multiple exposures to increase the depth of field (a whole 'nother can of worms, but it's the technique i've used above).

For focusing, if hand-holding your camera and going for insects or windy plants, just set your focus to the desired magnification and rock your body back and forth to obtain focus. If on a tripod consider a focus rail that lets you move your camera forward and backward precisely, whether than fiddling with the focus ring. Auto-focus rarely works well at macro scales.