Hii Sumit:

You are just 12th Pass out and Not Graduate, There You are Not Eligible for SSC CGL, The minimum qualification for SSC CGL is at least graduate. In order to appear for SSC CGL, you need to complete your graduation.

By this time You are Eligible for SSC CHSL, There are many posts which are offered to Those who qualify SSC CHSL such as Lower Division clerk, Data entry operator, Sorting assistance etc.

You can apply at the following link

https://ssc.nic.in/