A significant number of my macro images are flowers - some could really be classified a simple "Close-up" - using a variety of lenses from 12-40 and 40-150 f/2.8. The M.Zuiko lenses all seem to be able to focus down to at least half the closest that the Canons are capable of.
Most images, I try to shoot "live" - that is - in the garden, using mostly natural alighting, and I work around subject movement (caused by wind/breeze), by choosing to shoot if possible, quite early in the morning, before the sun has risen above the horizon, and has begun to cause local air movement. This, of course, requires that I tend to shoot with a relatively shallow depth of field, because the aperture is rather wide, and at high ISO settings so that the shutter speed doesn't have to be too low.
I have not yet needed to use flash, but I can see that time approaching!
However - other problems have begun to rear their ugly heads! Age is catching up on me, and the ease with which I used to go down to a rapid squat with the camera has been replaced with knee pain, so I've had to
resort to a rather interesting range of small tripods. This allows the camera to be virtually lying on the ground, and still be stable if triggered by a remote release. I have not used the Bluetooth remote, as I find it a little unreliable, so one of my Canon cable releases does the job (with the EM1.2 only).
The articulated LCD viewfinder works fine (particularly if shooting early morning when the high ambient light levels are not yet a problem).
The two images (opposite) show my Olympus OMD EM5 Mk2 using a 30mm f/3.5 macro lens and mounted on two of the new small tripods. The smaller of the two is a Manfrotto MTPIXIEVO-BK, while the second is showing it mounted on a "No Name" unit. The latter can have it's short riser extended to give more height, or the legs shortened by a small amount to lower it a small amount.
The Manfrotto can have it's legs extended further for greater stability (necessary when the camera is rotated into portrait mode and hanging out to one side with the body virtually on the ground!