The majority of sentences begin with the word '我'.  These sentences can be translated like this, '...i was nervous. i have learned new words. i have poor pronounciation...'  In this way, the whole article will be constituted of simple sentence forms and lacks nessasary link words to show the logic between sentence and sentence.  I make the same mistake when i write something in English, often leading to low scores.   don't know how to improve  〒︿〒