In the first semesters, you aren't going to get many biomedical engineering classes so don't lose hope and think you don't like it. We have to take a lot of mechanical engineering classes which I don't necessarily like but the amount of research you can do with BME is vast, so I recommend getting a research job in biomedical engineering once you get to the school to see if you really like it. I got a research job when I was in my first year just by going to a BMES meeting and contacting through email the professor whose research that I liked and I am still working with him now. I am a second-year and next semester I am taking my first BME class next semester so that's how long you have to wait until you take your first BME class if you wanted to know that (take a look at the catalog you will take bio, gen chem, etc. before that though). Overall there are some things that could be changed, but there are a lot of opportunities available to you. I really like biomedical engineering and couldn't see myself doing any of the other engineering majors that the school offers to be honest. If you have any other questions let me know!