if you’re sticking with “boats” it might not be a big deal on what credentials you get but if you are aiming for blue water you’ll need all the ‘stuff’. twic, pport, health, … the more the better and there are a LOT of them! anytime a chance comes up get it. cfc, tanker endorsements, there is no end to it and somewhere in there you’ll decide where you’ll be concentrating on and follow those.