I like Jeff Besos's framework of separating reversible and irreversible choices. Most of career decisions are actually reversible, and for a lot of them, going and trying is the best way of figuring out whether the decision was right.
To learn faster, remember that you can fix things. Don't be afraid to admit when you don't like something in your life. In long term, it's better to learn from mistakes and fix things than to imagine that you can figure out everything right from the start.