I agree! I won’t say “no matter how long it takes" because in my opinion, the sooner the better. There are no life do- overs and doing what one loves is so much more fun, but knowing what one wants often comes after some trial and error with what one “hates" as you say.
I will add it might be more fruitful not to wait until hatred is a upon us. That emotion carry’s with it some toxicity. I suggest relaxing into knowing what one does is part of the process of finding out what one doesn’t care for a d therefore what one really loves doing.
Btw, I also suggest using a partner of some kind (coach, mentor, guide, confident) to help. Why do it alone?