As your camera is a point and shoot, it is unlikely you can purchase a close-up adapter, but you can find a small (and cheap) mini-tripod, which is essential for macros.
Either find the macro setting (usually shown as a flower icon) or, better, go manual. Make sure your subject is still (no wind blowing outdoors) and not in direct sunlight (colours blow out). Use the smallest possible aperture (highest A or Av number) to keep as much in focus as possible. The depth of field in macros is usually very narrow. The exposure will be longer, of course, hence the need for a tripod.
Use the timer to help prevent camera shake.
You can see examples of flower macros
here,
here and
here.
Hope this helps