Holding still is always an issue wit macro. Many people like a tripod, but I find it impossible for insects. Most won't stick around while I set it up.
I use a 135mm lens with a couple of extension tubes for macro, the tubes were made by removing the glass from teleconverters. I also usually use a flash, I don't often get enough natural light to get fast shutter speeds, and it's tough enough to hold steady at 1/180 for flash usage. A flash with adjustable output helps a lot.
I also use a plain old 50mm lens with the barrel of a junk pair of binoculars mounted on it. Cheap effective macro and I've gotten some nice shots that way. Also works well in natural light, but flash helps too.
Makinon 135mm and 55mm extension tubes, flash, ISO 100, 1/180, f16. These flowers are about match head size in width.
The binocular lens macro rig, I know the description doesn't make much sense till you see it set up...
This shot was taken with it, the only macro rig I had at the time. Flower about the size of a quarter.
For insects, the only way I can use a tripod is to set up and sit there and wait for them. Otherwise I use the 135mm and usually 55 mm extension tubes, and the flash helps freeze motion a little better.
Getting the whole picture in focus is another issue, that'll never happen. When you get into macro your depth of field is gone bye bye, if you open up wider than f16 everything more than about 1/4 inch from your point of focus is bokeh. So you have to be very careful with focus, move only slightly and you're out of focus. I shoot a lot of insects, I try to use my elbow resting on a knee or a fence post, tree trunk, anything I can use to help stabilize the camera whenever possible, since I never even bring the tripod along. It gets in the way trying to shoot insects. A monopod might be worth a try, I've used mine now and then but usually I don't, I have to take it off when I start shooting tiny flowers, most are only a few inches off the ground.