The arrival fallacy is an illusion that once we complete our goal, we will attain permanent happiness. This is the whole premise of thinking that there is a “right” time to do something.
In all likelihood, there is never going to be a “right” time, or for that matter, any time. Since, ultimately, all problems are resource allocation problems, it’s never about the time but the allocation of resources, when you think about taking that trip or learning something new or exiting a relationship.
Borrowing from Yoda’s ‘do or do not’, there is no “right” time; there are only resources that you can allocate.