Buckshot23, welcome to the forum!
It's my opinion that there is no "best" class in the game - everything depends on gaming style. May be you can tell us what character do you prefer - do you like to cast spells or to be formidable swordsman? Eagle-eyed ranger with strong bow or well-hidden thief that searches all the kinds of traps? There are too many possibilities. Also - do you like your character to be on the front line or position somewhere in the back is enough?
And forgetting about all the roleplaying staff I would recommend to become a fighter - the game wouldn't too difficult this way for the new player.
Anyway, good luck!
And tell us about your choice
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Tanda,
with best regards from Guild of Assassins