Yak, the fact that you completed your PT degree and found a job proves you are able to accomplish whatever you want. You have already done the hard part. Just relax and apply what you learned. Pretty soon your job will become second nature to you. You will develop a routine and find it hard to believe you ever felt uneasy. Don't be afraid to ask a more experienced person if you have any questions. I have practiced in my field for over 30 years. I have some of my former students call me for advice all the time. I enjoy talking to them and helping develop their skills. I don't mind them asking for advice at all.