Doing poorly in college can I study engineering?

So the thing with me is, I'm pretty average. I have horrible reading skills. It takes me forever to read, and then I don't comprehend and forget all that I read. Also, I'm better at math but I'm pretty average at math as well. I'm currently in the college of engineering in a competitive top nation program and I think I got in because of my high standardized test scores because I practiced a lot and took prep cles and because I got lucky. Frankly, I don't think I'm able to study my major industrial engineering as it requires math. I'm in calculus 1 and I understand it, but I really struggle. Also, for me, I have to copy textbooks repeatedly for me to understand. If I just read a textbook, I can't comprehend. Also, I feel I'm doing pretty poorly right now in college and this is my first semester. I don't know what to do. Why am I struggling? Why is my reading so horrible, and how can I improve it? Also, my vision keeps getting worse like every 2 months for the past year so I used to be nearsighted and at -2 diopters but now I'm -3 and this change took place in a year because I've studied so much yet I still can't understand. Maybe it's because I can't see the book that I can't understand? I got sidetracked, but my reading comprehension is really bad, and also I'm addicted to the internet, which is worsening my grades, so I don't know what I should do but how can I be helped so I can graduate? How can I improve my comprehension skills and everything? I just feel so dumb right now. can I complete a degree in industrial engineering?