New job-starting over

I finally finished school and I just accepted a job offer in my field. A paralegal position at a private law firm. I’m giving up my job where I’ve been working at now. Good pay and good benefits but extremely boring and unfulfilling and sometimes very frustrating. I do like the people I work with. Anyway It’s not like I’m having second thoughts because I’m not. The pay is decent and the benefits are 100% paid for. I’m just getting anxiety and just going through all of the what if’s in my head.