You asked some very important questions!!!!!! Some of this information I learned the hard way!!!!!!!!!??!!??!!
Also, as soon as possible contact the alumni relations person at the college you will be attending to locate graduates of that school who were in your career interest area (preferably local people), so that you can talk to them to learn about the school, major, courses, professors, etc, etc,. This will prepare you in an invaluable way for your freshman year. Also, you might be able to visit these people on their job during the summer so you will become more familiar with the career you are intending to pursue. This will allow you to get a very important inside view of the career area. The inside view may be much different that the current outside view that you have.
Please keep me informed. I would like to follow your progress. Please keep me informed. I would like to follow your progress! Where are you going to college and what is your major?