Bobber fishing is one of the first methods we all learn when starting to fish.
Use a bobber just big enough to float the bait and weight
Wait for the bobber to go under before setting the hook
Make the leader light enough so fish won't be spooked by it
Make the leader long enough not to spook the fish
Use a bait that sinks
Adjust bait level below bobber so its close to the bottom but not on it