No one will tell you how to live your life.

I suggest you try talking to other people in your life about it. Ask a friend. Ask a parent.
Talk with a study advisor/counselor. Buy career advice/tests. Inquire with professionals in certain fields. Ask current students.

You being anxious about these decisions may also be a good sign. I myself suspect many people live on autopilot or make the decision the people around them expect from them. Then get into some midlife crisis down the road.

Then again, it took me until age 29 to make a decision myself, become motivated, and do it.