We do not "deserve" jobs. We want to work at something and apply to do so and get that kind of work. Worrying about our mistakes, everyone makes mistakes, is what you don't deserve to do! You will not be perfect in a job until it is almost time to leave that job for something more challenging! No one is going to give you a job at the top of the company when you are first starting, until you have worked your way up in other companies and are in your 40's and 50's, have 20+ years of working progressively harder and harder jobs.

Think of it like school; when you were in first grade, did you worry about whether you would graduate from high school? Of course not! You worried about learning enough to qualify for second grade.

Everyone enjoys or is good at some things rather than others. If you are afraid to talk on the phone, by all means do not apply for a receptionist's position! If you are all thumbs and have an allergy to paper dust (I do), don't apply to be a file clerk. If you are new as a sales clerk and don't remember how to do a return, ask for help! Very very few people are going to get it right the first and only time they try it. Try to concentrate on the work instead of what other people are doing or saying or thinking, etc.