work or continue studies

My view is that you should go for Job in case you are confident that you have done your studies properly and not planning any coaching classes or so. You can also carry your studies along with the Job.

Your age doesn't matters here for doing job or not. The point is that do what your circumstances and mind says. If you are confident that you have prepared enough and you can handle job and studies well, then definitely go for Job because sitting idle will be of no use.

Rest all depends upon personal circumstances and situations. 

Regards