My experience and recommendations: (I've only done this about 100 times!)
Remove the rear-most, "diffuser" pan first. It really doesn't make sense to leave it on as you will want to make an inspection of everything anyway. It HAS to be removed if you want to do a transaxle fluid change. Look at the top side of this pan for potential leak marks and notice the location so you can inspect the car. (All of the fasteners are T27 Torx.)
Next, remove the mid-pan. The fasteners are also T27 except for the 3 fasteners on each side (6 total) that are along the side rocker pan. These fasteners are T30 Torx, have a slightly different head and washer configuration. They are also a bit longer (30mm compared to 25mm). When re-installing these fasteners in particular - don't over-torque them. Watch the pan as you are tightening and stop before you cause any deformation of the pan. (I have seen plenty of cars where some gorilla has cinched these down and really warped the pan. Dumb.)
Neither pan uses any kind of gasket or sealer.
With the pans removed, change the oil filter first. With the filter changed, unscrew the top of the oil reservoir and then remove the drain plugs. The OEM plugs are not magnetized at all - FYI. Do NOT over-torque the drain plugs.... I've had that same Gorilla put these in too. No need.
Make sure to follow the priming procedure before starting the car after an oil change.
On the transaxle, make sure to remove the drain plugs on BOTH sides of the transaxle. The left plug will have a ~3" screen attached to it. The right plug has a magnetic tip and if this is your first change, don't be alarmed when this tip is globbed up with fine metal particles. This is normal.
ONLY use the Ford (Motorcraft) specified transaxle fluid.... and NOTHING else.
So far, so good. I am a little nervous to advise owners to change their own oil pump belt. This belt is very unique, requires very special attention for proper tensioning and if you muff it, you may have a catastrophe. If you insist on doing it, follow the manual to the letter and double-make-sure you have set the tension absolutely perfectly. I'm all-for owners doing their own maintenance, but you don't want to make any errors here.
I think the oil pump belt is best accessed from underneath and there is no reason to remove the subwoofer and access panel. I use a small torx bit (~1/2" long) and a boxed end ratchet wrench to remove the cover.
Hope this helps...