Don't worry so much; they know you are "new" and it will take time to get use to working and learn the routine they have for the job they want you to do. They would not have hired you if they did not think you could do it well. Don't put too much pressure on yourself, remind yourself it is new to you and you are a beginner. I get a lot of help remembering when I am being introduced to so many people on the first day and forgetting names, etc., that I am only one relating to many and they are many relating to only one.