I think it is a good idea to reach out to people in those various fields to better understand the various options and role/responsibilities. Often times it can be more wide ranging than you may think. I am not sure the best way to track people down in those fields, however using your local businesses as well as LinkedIn may help. Tell them you are interested in learning about what they do and how they got there. If you dont get replies, just keep trying!
Additionally, I would seek to educate yourself as much as possible using the internet and other public resources. This should help you ask more and better questions with the individuals you speak with.
I remember facing a similar dilemma when I was going to school. I was drawn to all three too, but couldn't decide which path to take. Just like you, I wanted to find the one that resonated with me the most. It was a challenging journey, but ultimately, I chose to follow my interests and let them guide me.
I started by taking courses in each subject, diving deeper into the topics and exploring the various aspects of each field. As I learned more about each discipline, I began to understand which areas truly captivated me and aligned with my long-term goals and personal values. Throughout this process, I sought advice from mentors, professionals, and even my friends and family. Their perspectives and experiences were invaluable in helping me find my way.
I also took advantage of internships and volunteer opportunities related to the fields I was considering. These experiences allowed me to gain first-hand insights into the day-to-day work and the challenges and rewards associated with each profession.
After much reflection, research, and hands-on experience, I ultimately changed my major to sociology. It took some time and effort, but I am glad I pursued what interested me the most. I encourage you to do the same: explore your passions, be open to new experiences, and remember that your career journey is unique to you. It may take time to find your path, but with determination and a focus on your interests, you can find a fulfilling career that aligns with your passions and goals.
I was a Sociology major because of my interest in groups and how different groups function and behave in society. I partnered that with Marketing and applied many of the principles of sociology to better understanding the audiences I needed to connect to or sell products. Understanding needs and what drives them, helped me to better position the the messages and products.
Know that any of the areas of study that you mentioned are a great foundation for many different careers!
But nowadays, you can find all sorts of good books and lectures for free online about all three too, so you don't have to wait till you're in college, or pay the money for a class, in order to find out! Look at EdX, Coursera, The Great Courses, and TED talks for lectures about any of these subjects. You can find things about EdX, Coursera and The Great Courses and each of those subjects on YouTube as well.
And check out what you can find by some great psychologists, criminologists, and sociologists, and see what they're like and whether you might seem a better match with one or more of them as people with their worldview. Jordan Peterson, Les Parrott, John and Julie Gottman, John Townsend, Jonathan Haidt, William Julius Wilson, etc.