Silly vim question
One of my friends suggested that I start learning vim, and because I have an abundance of time on my hands, I decided I would, and have since enjoyed learning immensly. However, one of the commands I came across that would be useful is yanking or cutting text into registers. The instruction manual said that if I wanted to yank a line into register a, I would just hit ayy. However, this throws me into insert mode at the end of the line and inserts yy. Similarly, b already means something else as well. Did I misunderstand the instructions, or is there an extra step involved. I was fairly certain there are 26 named registers that correspond to letters. Anyway, thanks for any help.