All very simple, oil and filter change is the same as in most cars. Air filter is just the screws on the box cover. Spark plugs can be got at by removing the coils, 1 bolt and pull, and then you can get to the plugs with a socket, extension bar and a flexible joint. The cabin filter is the most difficult bit, getting it back in.
Take off the cover (might need a small screwdriver to help get the clips off) Then just pull it out. Getting it back in is more difficult, it has to be squeezed in slightly by tucking it in and around part of the pipes in the way.