Check out FishAholic Fishing on Youtube. He’s a young 20 something from the Northeast but he did a Florida Road Trip last spring and did a ton of wade-fishing, Jetti Fishing and Bridge Fishing (some in his yak, too). He went all over the state and I’m sure you could find some great examples techniques, species to target, etc. Great Content. Just fishing/living out of the back of an SUV so he kept it pretty simple.
I don’t have a lot of mainland FL fishing but I do have a bit of shore and bridge fishing experience in the Keys. Down there, like others have said above, if you throw a live shrimp off a bridge it will immediately be machine-gunned by a bunch of small snapper, grunts and pinfish. And they’re VERY good at finding their way around the hook. Bait shops down there also sell frozen squid. If you cut that up, it lasts a little longer on the hook. But you’re really only going to catch the little guys, maybe a keeper crappie-sized mangrove snapper here and there. Pinfish on a sinker rig around the pilings might get you into bigger snapper, grouper or jack or even bigger predator. Tons of fun, but make sure you have a landing strategy – IE a way to fight it towards land if you tie into a bigger fish and can’t hoist it up to the bridge deck. Sounds simple enough but if there’s 20 locals fishing for dinner between you and the shore, it gets more complicated.