Thoughts and Questions on essay 1

A question I have with the essay is just exactly how is my wonderful teacher going to grade my writing. will she be harsh and difficult, hunting down every grammatical error and punctuation. can she be lenient and just help me and correct me without huge point loss. these are the questions running through my mind questions of how can i save every point that i can earn. I have had teachers so difficult that if it was correct they still took of because it was not there style of writing. The first essay is going to be the hardest because i have know idea of what exactly she is looking for.