The second letter in the class is the booking class, the first is the cabin.
f = first, c = biz, y = coach (m = main = coach)

You did a good thing by blacking out all personal info.

BTW. here's a nice IATA guide on what is the format of the 2D barcodes. Many airlines now use encrypted barcodes that you won't necessarily be able to reproduce yourself, but there are still some that are doing plain-text barcodes.