Switching into the college of engineering?

Hey, I had a quick question about changing my major. I am a freshman applicant who was admitted under the major of Explore Technology. If I were to want to change to CS, which is in the college of engineering, would it be difficult to do so? How much do you think that it would set me behind? I am a bit worried because I am an out of state applicant so it would cost me more to attend and not be able to join the college of engineering.

I am currently a full IB candidate under the diploma program and am taking the prerequisites classes for engineering such as Physics sl, lang and lit HL, and math hl which correlate to the classes at vtech that are necessary.

Note:
I should have applied for engineering since I believe my stats are not awful to be considered a prospective candidate. (SAT- 1380, GPA- 4.5W) but I was concerned with my chances at a college like Vtech.

http://www.enge.vt.edu/_files/undergraduate/com_requirements/COM_NonGE_2018_Application.pdf