Just pull the plastic engine ocover off (no tools required), then you will see it.
It is at the front, and has a cover that is screwed on (it has 25Nm written on it, and an arrow showing which way it is to tighten it). Undo this then pull the filter element off and put new one on. Remember to change the 2 rubber o-rings with the ones that come with the new filter, and oil them up before you re-assemble it all.
Hope that all makes sense, and helps.