You choose purpose, you don’t find or somebody or the universe has it drawn for you in some form of destiny. YOU CHOOSE PURPOSE, I can’t stress this enough. Most people just let this be an unconscious decision and so they call it fate, don’t be like most people. Just pick and stick to it.
If you don’t know what your current purpose is, just ask yourself: what is my main worry today? That will most likely become your main occupation. Life in a capitalistic society will pressure you to make money your main concern. This is where the criticism of existentialism being classist comes from, and I get it. The question of whether an unconscious choice is a choice is open for debate, but I believe in self-agency, so I do consider it a choice nevertheless.
If doubt comes, remember: you choose purpose, so if you are thinking of changing, it’s going to be the same situation, where you are going to question yourself for lack of certainty.
It’s zero sum, it ends up in the same place regardless of the choice, just choose the thing you think is worth it, and what I think is worth it is learning, even if it gets hard, because settling for comfort is easy. Time is the only thing we can not get more of.
Just choose it and stick to it, there is no such thing as regret, there is only death, and by then what you chose and did not choose will not matter.