hi,

well in most of the institute there is no age limit to apply for mca course. there are many candidates who go for job after completing bca, some years later they again opt for mca. if you have no working experience then it also fine to apply for mca. you should study hard to secure a well paying job. at the time of interview you will be asked that what you have done these years, so be prepare with a proper answer to justify the year gap.

best of luck for your future endeavor.