A voice from the opposite end of an engineering career: At this point in your life you have plenty of time to make any final decisions. If you could save your message and then look back at in 20 or 30 years, you would be amazed at all the changes in that time. Trust me, at this point you don't really know what final career you will be following. You do, however, know what kinds of things fascinate you, intrigue you, turn you on. I assume that's why you are pursuing the whole field of engineering.
When I was at your point in life I discussed the very same question with my father, who was a mechanical engineer specializing in machine design. He and I had always shared a fascination with all things aviation. We built and flew models, attended airshows, read biographies of the Wright brothers. It just made sense to me that I should pursue Aeronautical or Aerospace Engineering. He gave me some very good advice. He was very plain spoken man and didn't care who he offended. He said, "A good mechanical engineer could probably get an aerospace engineer's job, but an aerospace engineer probably could not get most mechanical engineers' jobs." (No offense to any aerospace engineers out there!)
All he was really saying is that the wider and more basic your educational base is the better. A fresh young aerospace engineer and a fresh young mechanical engineer enter the job market. The mechanical engineer could get hired by any number of manufacturers, utilities, government agencies, etc. He or she could go to work designing cars, bridges, buildings, automatic equipment, special machines, consumer products, turbine engines, ...... The aerospace engineer probably does not have that many options.
If you look all the diverse fields of engineering, you will see that they all evolved from the few basic disciplines - mechanical, electrical, and civil. Actually I think civil engineering was the first official engineering field. If you study the life stories of the early famous engineers you'll see that they all started as civil including even John A. Roebling, the designer of the Brooklyn Bridge.
I always advise young folks to immerse themselves in the basics. You have plenty of time to specialize later, and nothing you learn in basic mechanical, electrical, or civil will be wasted. If you choose later to go back to school to get more specialized education, you will do so with much more confidence.