I really wouldnt cut your hair short, im a 2c-3a and tend to find the shorter my hair is the fluffier it is. If you dont have a problem with frizz go for it!
As for second day hair, get an old spray bottle (preferably a leave in conditioner spray with a small amount still in) and fill it with water. Spray over all your hair lots! It will dry fairly quickly too which is a bonus. Use serum too.