Yes, don't let the anxiety get to you; it use to take me 6 months to get use to new jobs (I once spent 10 years just getting and ending short-term, part-time jobs so I could "practice" starting and ending jobs, that aspect made me so anxious). It sounds like a great job though, getting paid and on-the-job training. I worked for an engineering firm that was good for that, training young engineers well and then they would leave for better jobs.