Hello, fellow Wurmian! If you are reading this, then you must be looking for some help fighting the various NPC creatures in Wurm Online. I will say this now, because it is probably the most important information you will need starting out: your starter shield and sword ARE NOT real combat gear! New players can easily die to a dog (one of the weakest creatures in the game) using the starter gear. You will need 20ql weapons, armor, and shields to start out, at the bare minimum.
Generally, when fighting most creatures, the best method is to aim for the head. However, when fighting trolls and other armed creatures, it is often a better choice to aim for the upper right parts, as this will allow you to hit the head (for extra damage) and the right arm (to inhibit the creature's ability to use its weapon). Flanking often is also a good tactic to use on armed creatures, especially before the arm can be damaged.