Well, that's the neat thing about a camera that you can use multiple lenses on. It gives you a choice of "working distances".
I have three Nikon Micro lenses: (1) 60mm, (2) 105mm, and (3) 200mm. All three will allow you to get the same image on a closeup, but each has a different working distance. I don't have the exact figures in front of me, but roughly with the 60mm, you would have to be 1 inch from the subject. With the 105mm, about 2 inches, and with the 200 mm, 4 inches away.
One problem with the 60mm is that there is no way to easily get a good shot that close, because the lens itself will shadow the subject from the flash(es). So I tend to use this lens for moderately sized animals because I can be a comfortable distance away from them while getting photos and yet have them mostly fill the screen image.
With the 105mm lense, it works great for small animals or things like closeup head shots when you don't want to be right up against the animal. This wil generally spook them when you get within their "space" with a camera lens, so the 105mm works well for this sort of thing. This is the lense I tend to use most often.
The 200mm is the one I use the least. It give TOO much magnification unless you want to be quite distant from the subject. It works well for getting photos of spiders and bugs without spooking them or they are not readily within reach, but trying to take a photo of a snake or lizard is rather difficult because the working distance is so far away.
If your camera has a threaded lens, you can somewhat do the same thing by attaching close focus or macro filters on the front of the lense. These are sort of like magnifying lenses, but with camera quality glass being used. They generally come in sets, which can be combined, so you can experiment quite a bit to get the right magnification for what you need.
I won't go into details here, but one thing that you REALLY need to study up on is the term "depth of field". The closer you are to a subject, for micro shots, the wider you need the depth of field to be. This can make all the difference in whether your shots look good or not. But like I said, there is a lot more to this, and I just don't have time right now (almost 4am) to go into the details.
Pick up a good book on flash photography and general theory. Then practice a LOT. Nothing beats experience with this stuff.
Good Luck!