Spend some time thinking about those questions as that will help shape your path. I'd also encourage you to talk to as many people about their jobs, what their day to day activities look like, what they like best/worst about their jobs, and how they got into that space.
Internship positions, volunteering, talk to your teaches/professors and counselors, and others that you trust.
Once you have that sorted out then find relevant professions in that area. For example you have interest in Science then which area interest you , engineering, medicine etc.
Talk to various people in that field and understand pros/cons of the profession, also look at job portals for jobs in the area .
This will help you to clear your mind as in which area you want to pursue.
All the best for your search. Hope you find answer to the question which most folks always struggle.
The OOH breaks down tons of career paths by occupation group, ranks them by pay, fastest growing, and provides some great general information. I would start here and then go to sites such as indeed.com and careerbuilder.com to check out the opportunities in your area.
Do you like to interact with people? Help people? Are you calm when talking with others? Do you get easily frazzled when a lot of things are thrown your way? Do you like/dislike numbers? Are you more creative or more of a business-minded person? There are many questions you need to ask yourself. When you narrow down what you like to do as a person, then you can start fitting those characteristics into jobs that have them. For example, if you see yourself as wanting to help others, then you may be good in a healthcare role. If you don't like to be dealing with a lot of people, then you may consider an office type job that requires a lot of computer work or number crunching. Do you feel you could handle going to a university or would you rather learn a trade by working as an apprentice, as in plumbing or carpentry?
Do you need to be outside? Would you be okay working in an office all day? Or maybe you need a little bit of both. Do you enjoy driving around or do you like to stay put all day? Would you enjoy traveling a little/a lot?
Once you've narrowed down fields/professions that you could see yourself doing, the BEST way to determine what a job really entails is to talk with somebody who does it. How did they get there? Did they go to college? Did they do an internship? Ask them what a day looks like for them and if they like it and why.
Good luck in your search!
Here's a link to a similar question and answered by a few CareerVillagers including myself.
You just took the most important action by asking.
I would highly recommend simply asking, making a visit, and connecting with individuals or companies you're curious about to shadow them for a few days or so (tell yourself and those you inquire that it's for research).
The right company/team will appreciate your curiosity and personality solely because you're wanting to learn more about them and what they do (important).
Also I came across Indeeds career pathway video and thought you'd find great value in this too (its short too): https://youtu.be/CkF9OnmITRM
So, I have a few next steps if you're up for it?
Jeremy recommends the following next steps: