ditto above. Due to HARD lessons learned: I would make sure you have a drip pan large enough to catch all the oil AND try to put a large box or droop a large heavy blanket on the "wind side" of the truck to combat the wind blowing the oil all over the place/face, hair etc...
It isn't to difficult, you should be able to do it from start to finish in about 20 minutes or so.
Oh, and don't forget to check the filter for tightness before and after the truck is warm/operating temperature.