What a relief.
Everything that follows the moment of commitment is information to you about how much you really want something or how much you don't. Sometimes, it's the first time you actually realize you really just don't want this thing - and can stop fooling yourself (or trying to please others or not let them down) and just get on with your own life the way you want to live it.
We can waste a lot of time trying to 'should' ourselves into things we never wanted in the first place (like those college majors we dithered over). Commitment is the great sorting hat!!
(May you not end up in 'Slytherin')