just remember they are strong but very slow. if you keep your head you can pretty much just dance around a troll and make a fool out of it. you might die a few times getting used to their attacks but once your familiar with how they move trolls are a joke.

Atgeir like was stated above will stagger the heck out of them but it can be just as fun to zip around them with a dagger or use them for shield parry practice once you have a bronze buckler. Trolls are usually the first mob in the game that teaches a new player about parrying properly and i'd take advantage of that, its going to be an important mechanic throughout the game.