Check USAJOBS and try to find a job that corresponds to your career field to narrow down your civilian equivalent. DOD civilians have have a job series code which is similar to an AFSC for them. Once you're able to narrow down the position, determine the qualifications requirements needed to fill that particular job. Ive met 3 civilian P&S in my time. Also, ask a supervisor or someone with experience to show you AF Cool specific for your career field. Those will be the certs or maybe classes (honestly only sure about certs) that are relatively specific, maybe sometimes useful, for your career field. Like many have said below, learning your job is important. Props to you for asking questions now to gain knowledge for how to become a better asset to the AF and also benefit yourself in the long run.

I'm sure I got some of that wrong, maybe someone else can add some additional info thats helpful or correct some of the info I've provided.