There is no one right answer. There are only choices.
There is no guarantee that the choice you make ends up being the "right" one, especially if you look to someone else to make the choice for you. Your best chance of knowing that you made the right choice comes from developing a profound relationship with your intuition. This doesn't mean you only make a choice from your intuition. You include reason and rationalization, and you also include your intuition. When you include the innate intelligence that your body provides you, you can at least trust that you are on the right path for you, even if it doesn't end up being the "right" path.
The big picture is so much more important than getting the next answer right. It is often through getting it "wrong" that we have our greatest learnings, exciting growth, and beautiful detours. These unexpected experience are part of the bigger picture. If you commit to being responsible for making your own authentic choices, moment by moment by moment, you will certainly end up with a life that fulfills you. You can't do this if you are waiting for someone else to give you the answer, because it doesn't exist.