First off your equiptment has to be in perfect condition. Big Tuna's are not forgiving when it comes to weak or defective equiptment. I would absolutly recommend jumping on a charter or open boat to learn first hand. If you do go i would go to your top local bait shop. get your tackle and flats from him He then may more apt to help you out with areas and techniques that are producing. As for chunking it depends who you talk to. Some guys chunk heavy, some light. I personally think if you chunk too heavy the fish will lay back in the slick and gorge themselves on chunks with no need to move into the baits. Also try to cover the water column deep baits, mid bait ,surface baits see what is working then. Like anything else there is a learning curve. Go when the weather windows are there with a good bite and just try it. Sooner or later you will hook up.