life advice

What after highschool? What course? How do I do when I only know the sector where I want to work but not my exact career? I can't seem to be able to decide. It's because I've never tried any job. How the hell will I know what suits me? I'm scared... I'm stressed... I'm tired...

I think it is fairly self-explanatory. I have a choice to make which I have put off for way too long, and I can't seem to find the answer to this question. Should I just work so I can pursue my passions privately and perhaps change directions later? Or should I dive (blindly) into a direction...

Do you think if it's a sound advice? Why?