Best place to start is your WHY. Your why represents your purpose and what makes you get out of bed in the morning. It gives you endurance during the difficult times because you have a higher motivation that's not linked to a paycheck. Yes earning money is great but your why is more important than that. It transcends worldly things and is a much deeper part of you.

Some great questions to ask yourself is:
1. What are you good at? natural or learnt abilities.
2. Do you lose track of time when you do a particular task? is there a career in this?
3. What breaks your heart in the world?
4. What have people complimented you on about your personality that could be used in a career? E.g. Teachers require alot of patience

Definitely ask your friends and family what they think you are good at and what stands out for them about you. You could get some valuable insight from this.

Best of luck!