Keep Calm, panic and you'll feel more overwhelmed, trust me.
get it over and done with.
As soon as I'm assigned, get to it.
But then again I can bust out over 10 pages for a paper in a couple hours.
As for the paper and sheets you have, have a plethora of plastic wallets, ring binders, folders, all sorts. Your organisational needs will change for each subject, and you may need to change it around.
It'll take a few weeks, and it may take time, so the important thing is to not panic! You've got time to adjust.