If you want to be a nuker, use int....pure int. But you may well need a hell lot of HP pots. But this does not mean that your build is wrong. There is no such thing as a wrong build.
you should also get the archer skills to master. Then try to master forces to imbue your weapon with more damage. It's up to you to choose Fire, Cold or lightning.
I am also a noob myself

. ..played the game for a week now. You can search some threads here about leveling...best to find the quests guide.
I am a bow user too (pure STR/FIRE/LIGHTNING) - lvl 20.
