native speaker or non-native proficient speaker does not affect one's patience so i would ignore the above answer.

anyone willing to help you will obviously be patient. what you need is someone familiar with grammar etc, which has nothing to do with your native tongue.

i am native speaker and have helped many people as i have lived about 10 years away from home. my "students" all appreciated my patience and understanding.

unfortunately, i don't have time now to help you. good luck finding someone.