Welcome to life. Most people, at any age, have not figured out what they want to do. Many are also faking it, particularly on social media.

Don't buy into the "purpose driven" cultural norms. You are young. It will be revealed to you through your maturity not achieved because you picked it.

Just look at your article. That in itself is a start. The journey is the purpose, not the destination.

You'll be fine.

PS - Read "Man's Search for Meaning" (Viktor Frankl)