i am a noob to the game, not the show.
just started my first character as an engenneer, but i am planning on getting a science vessel, so i
want to change my character to a science officer.
can i do that in a respec or should i creat a whole new science officer character now?
i am lietenant 6 now, just played for a couple days.
You do not need to be a science officer to fly a science ship. I'm an engineer and I fly an escort.
A respec will allow you to change you're skills within your profession. There is no way in game to change your profession (science, tactical, engineering) once you've generated your character.
As was previously stated, no class of ship is limited to you. As an engineer, I suggest trying escorts - your engineering captain's skills will help tremendously with keeping you in the fight.
And... sadly, no. A respec will not change your class-specialization nor your passive traits. With all the changes that have come over the past month, I certainly wish there was such an ability. It would have saved me lots of heartache.