I would advise anyone who aspires to a writing career that before developing his talent he would be wise to develop a thick hide. — Harper Lee
When you set out to write, one of the best things for you to learn is how to take criticism. To do that, you need to listen and take notes. Hear what’s being said and understand if and how it’s applicable to not just what you’re writing, but how you write. Use the criticism to become a better write, but be careful of the source. Early in my career, back before computers, I was looking for a job and had sent out resumes by mail. One person sent it back, having circled all the errors. No other comments were made though. I was younger and was hurt by the situation instead of seeing it for what it was: someone with too much time on their hands. Contrast that to when I was writing my second book, Stepmothers Anonymous. I asked my sister to read and comment on it. And she did. She had plenty to say. I had to rewrite several portions of the book. But here’s the thing, I’ve been able to use her comments not just for that book, but for the subsequent ones I have written. So embrace critiques and use them to better yourself and your craft.