All the above, but above all........Don't be an arsy little know-it-all just because you're straight out of groundschool.
The Captain's probably forgotten more than you know so just listen politely to what he has to say and learn from what he does, right or wrong.
Only interrupt if he tries to kill you !
It's actually a great career if you know when to keep your mouth shut. After all, it'll soon be you turn ! .........Enjoy.