here is how I do it and everyone else that goes it alone here does as well....
buy yourself a cast net....start in 4-6ft range at first until you become proficient...if you buy a 10-12 footer you wont be able to throw it...practice makes perfect. watch some videos on how to throw a cast net...and then practice over deep water where it wont get hung up on oyster beds, submerged debris, etc.
throwing off front of deck boat, off a dock is easier than off bank as you are up higher....
if bating is legal then buy a bag of fish meal...and a bag of clay that you mix with water and then mix meal and clay together to make bait balls. here you can only do the baiting during september for specific period so check rules. We catch the rising tide and after dark if possible....shining lights off dock or boat. Throw your bait balls about 4 feet from casting area...one per area. On the dock we do one on each corner of floating dock and one in middle towards deep part. let sit for 15-20 minutes.
then you cast your net....alternating each bait ball one at a time. Let net sink toward bottom then pull string quickly to close it up and pull up your catch.
If baiting not legal then you will look for them being chased by mullet or other fish and jumping in water....throw net there if you can.
during day time I look for fish chasing them....or for birds....you can see them just under surface of water....throw net...let it sink down near bottom....close quickly and pull to boat or dock.
you tube is a beautiful thing...you can see it before doing it for first time.....but be prepared to get wet....to get tired...and to have a hell of a time.