Nursing is such a great profession. I work in Med/Surg Adult ICU. I chose my specialty because it felt like home. I started as a CNA in an ICU and once I overcame my fear of super sick patients, everything started to click. I love the complexity of illnesses, autonomy as nurse, and problem-solving the that my patients require. I like to describe ICU nursing as putting together pieces of a really complex puzzle with pieces missing under a time crunch. It takes someone that is cool under pressure, is detail-oriented and loves a challenging job. It sounds scary, but with training, experience and a great team; it's the only specialty I know I'll thrive in. I hope this helps!
If you are leaning towards one specialty over another, I would recommend getting your CNA license and working to see what nursing is like in that specialty. It helps with the transition from student nurse to practicing nurse as well.