not silly i learnt it from here
on the A380 there is 2 separate Y (econ) cabins, most of downstairs and a small upper Y cabin, rows 32-36 , much quieter and faster service.
if you go on website to select your seats you may be able to select the upper cabin now you are getting close to departure. if you can i personally recommend row 32 , 35 (Exitrow),33 in that order. and just as a huge tip. the peeps you are competing with for upgrades will be up here, so if you want to get a good seat watch the available seats like a hawk and they will often open up in the last 24 hours as upgrades get allocated. grab 32 A or K the second it comes on board.
and it the website wont let you select the seats, a quick call to CS and you might be lucky to get them to slot you in
good luck