What are some of the reasons that Helen thinks she will be unsuccessful in her second year?

From the text:

Unfortunately, many of the books I needed had not been embossed in time for me to begin with the classes, and I lacked important apparatus for some of my studies. The classes I was in were very large, and it was impossible for the teachers to give me special instruction. Miss Sullivan was obliged to read all the books to me, and interpret for the instructors, and for the first time in eleven years it seemed as if her dear hand would not be equal to the task.

It was necessary for me to write algebra and geometry in class and solve problems in physics, and this I could not do until we bought a braille writer, by means of which I could put down the steps and processes of my work. I could not follow with my eyes the geometrical figures drawn on the blackboard, and my only means of getting a clear idea of them was to make them on a cushion with straight and curved wires, which had bent and pointed ends. I had to carry in my mind, as Mr. Keith says in his report, the lettering of the figures, the hypothesis and conclusion, the construction and the process of the proof. In a word, every study had its obstacles. Sometimes I lost all courage and betrayed my feelings in a way I am ashamed to remember, especially as the signs of my trouble were afterward used against Miss Sullivan, the only person of all the kind friends I had there, who could make the crooked straight and the rough places smooth.