2 hours is long for sure. Seems that you'll need the sizing. If you want to speed development you can add a little (1 tablespoon?) bleach in the development bath, check often and when you see signs of clearing transfer the print to ordinary water. That speeds up things a lot, kind of a development seed.

Can't comment about your sizing amnt; I just dip the sponge brush to the size and brush on the paper, I do it by eye and feel.

Regards,
Loris.