For a simple-to-make, bottom rig, try the chicken rig. All you need is some line, several hooks, a rubber worm, and a weight.
This rig, also known as a high low or deep drop rig, works well when targeting schooling fish inside a water column because it floats the bait vertically in front of them. The chicken rig also works well when fishing near various types of structures and cover such as tree stumps, weeds, debris, rocks, wrecks and reefs.
While this rig is most often used for freshwater fishing, it will also work in saltwater fishing. The chicken rig is used to catch a large variety of fish including yellow-eye snapper, bass, and vermillion snapper.