Sam, no need for the handbook, just switch the lens to M. The focusing ring does very little when you're that close and you focus by moving the camera back and forth. A tripod can be a bit of a pain to set up unless you have time and a very cooperative subject.
Get very close to the subject and frame up roughly. You'll find the zoom ring adjusts both framing and focus at this distance. Then when you're in the approximate zone, hold everything very steady and just rock your body back and forth very very gently and watch the plane of sharpness move over the subject.
You will then see how little depth of field you have, with almost nothing sharp either side of the focused point. So you'll probably need a high f/number to get more of the subject sharp and that will run you into longer shutter speeds. That's when the tripod is really useful, or flash etc, unless you're in bright sun. Macro is tricky