As white, go with e4, there are numerous continuations on it and it gives you great learning chances, as the game can go both tactical and positional.
As black, e5 as a reply to e4, d5 as a reply to d4, and e5 as a reply to c4. d5 as a reply to nf3.
That's the tips I got as a beginner, other than that follow the opening principles (activate you'r material, get your king to safety etc).
Is there some openign that's good for beginers or whatever? They told me not to worry just to practice the tactic trainer so I did and even my score is ok. So now what? I need hlep on openings.