【正确答案】Dear Mr. Wang,
I am writing to inform you about my decision to resign from my current position.
Thank you very much for having given me this opportunity to take such a promising position in such a wonderful magazine. However, after the two months' work, I have found that my character doesn't meet the requirement of this position. What's more, the shortage of professional knowledge, both in designing and editing, has badly influenced my performance in daily work and my personal development in the future. Therefore, I decided to quit this position after careful consideration.
I wish you will consider my request, and I apologize for any inconvenience I might have caused.