Internships are the best way ! It gives you an idea of what you’re going in for..and if you realise that you are no longer interested in that field, you will learn a lesson which will definitely help you at some point of time in life.
Talking to people from different fields , searching , watching videos, internships is the best way because you experience everything by your own self .
Internship, courses on udemy coursera, projects
Through internships. You could also do some part time jobs to actually dig your inner passions out.
Doing a short course really helps
Internships else you could always switch