A backstory for your character is like background information for a character. When you write details about a character before you write your story, you are then able to use these details later on to help you improve your writing. You are able to incorporate their likes, dislikes, childhood, friends, family & more all into what you're writing. Its easier to come up with these earlier on than during your writing.
A) "I" Should be capitalized.
Why?
Because it is the first person pronoun.
Source of references and evidence
I am not a grammar master, but I believe this is what it should say.
I'm a female citizen of the U.K. who has self respect without any prejudice, something that you are deficient in.