There is a foot stool at the foot end of the seat which when in bed mode forms part of the bed.

If you are choosing seats in advance (either free with status or by paying) then you should be aware that there are a few window seats where you can get to the aisle without having to step over someone else's legs. Likewise there are a few aisle seats where no one else will have to step over you. Have a look at a seatplan website for details.

for a passenger travelling alone the centre seats are not recommended. It is a choice between a window seat for privacy (my preference on a night flight) or an aisle seat (which is my preference for a day flight because I like to see what is going on).