Fuel filters, you have two. Small inline clear (primary) just loosen the clamps and stick the new one in, pretty straight forward. The main filter (secondary) is a cannister type. To replace it, loosen the large nut on top with a socket and then just spin it off the rest of the way. Have the new filter handy and put them face to face, flip-er-over and fill the new filter with fuel (saves a lot of pumping). Spin the new one on and then retighten the "nut" on top to seat the filter. If you have the new style priming pump, just pump it till you hear a pressure relief valve in the IP vent. If you have the old style (white knurled top) you will need to unscrew to release the "handle" then pump. Be sure to retighten it when finished.
The oil filter is in the housing near the firewall, round with two nuts holding the top down. Remove the nuts and lift the lid (which has a shaft running through the middle of it) Drop the new filter in, lube and install the large o-ring, and inspect/replace the two small o-rings on the shaft. Also, some drain the oil cooler (I personally do) by loosening the bottom flex line (be sure and double wrench and careful not to crossthread $$) Caution: do not overfill the oil, it is better for it to be a quart low if anything, halfway between the detents on the dipstick.
Most of all, it is a good idea to do both of these while the engine is warm.
Oil drains better and much easier to start after changing the fuel filter.
(I learned about the fuel filter years ago on early Ford 6.9 It did not have a priming pump and was next to impossible to start afterwards if cold)
Hope that helps and let us know about your "first time".
(Changing MB filters that is!)