If you are not prepared and just want to appear in CSS to familiarise yourself with the paper pattern, skip it and appear next year with full preparation.

But if you are confident of your preparation, talk to a colleague at work and discuss the whole issue candidly. Tell him that your current job is more important, but you would like to appear for CSS. There is nothing wrong in looking for a better opportunity and that is what you are doing. Besides, people have a special treatment in reserve for any potential CSP officer.

Hope that helps!