I cut my waist length to office length in 1980. Felt bad for years, wasn't until 1996 I could grow it back to redundency length, then 6 months up the Amazon length, to eventual heroic length again. Then back to office length again in 1999you'll get used to it in no time, and wonder why you didn't cut it long ago.
Even now when my hair is at it's current sadly few mm length, I still wash it a couple of times a day - old habits.