I need help or advice on fishing for king mackerel, cobia, and bluefish out of Sebastian inlet Florida?

I have a 1956, 13 foot Bostan Whaler powered by a 2003, 25 horse yamaha 2 stroke. A 12 gallon gas tank( which gives me a 95 mile range) i haveno elctronics or anything so we usually stay to where we can always see the inlet, maximum of four miles straight out. We don't usually care if we catch anything, we just enjoy getting out. I'm 16 and need some pointers in catching anything. We usually troll a three line spread, with Bally-hoo or split tail mullet on heavy casting rods. We dont have no wire leaders and use mono line and understand were gunna lpose a lot of fish. We usually try to find bait pods and work those but like I said I could use some pointers, I'm just starting. Should I troll the beach?