The cheapest way to do macro is to use a $2 "reverse ring" adapter that has the same thread size for a filter on your existing lens. You will screw the lens' front to the adapter. The other side of the adapter goes on the camera.
In effect, the lens is mounted backward on the camera. You'll need to use manual focus and set the camera to "release w/o lens".
Go to eBay, search for 140872204712
The picture speaks 1,000 words better than what I wrote.