Happy or Sad?

Next year going to class 3e1.. I was happy but i doubt my ability of studying in the first class. I am really scared that i could not cope well with my studies. I learn things slower than other people ten times... People already know the topic well but sometimes i am still struggling to understand the topic. I know i must work extremely hard than the others.. I am scared that i will have many difficulties and will give up myself easily.. Next year, I must really add more oil...