Damn I should have made a guide as I did mine like 2 weeks ago. Basically...
Jack up car and there is a plastic protector that you pull off.
Undo the sump nut 8mm I think same as the oil sump nut and let oil drain out.
Replace washer and do up sump nut to 20-25Nm.
Open bonnet and look down near the gear box to find a black plastic wing nut undo that and find some garden tubing and a funnel, fill oil up (it's about 3-3.5 litres) or until it dribbles out.
I put a little rubber o'ring on the wing nut and hand tightened it.
that's about it, easy job takes no longer than an engine oil change probably less time. I put in 75w80 millers GL5.