Answer:
1. What challenged Estania was speaking English. She was very shy, and wasn't making any new friends. She wouldn't answer questions in class, and she was being made fun of.
2. Something that is challenging about reading for me is being dyslexic. It makes learning and reading new words difficult for me. (if you aren't dyslexic, then you could say something like the pronunciation of new words is confusing for you when you are reading aloud)