What job i can get after 12th only
There is not much scope in looking for a job after 12th. So, I'd suggest you complete your graduation first the finding a job will be a lot easier and you will also be able to grab a decent offer.
But still if you want to start working then you can try for BPO, DEO or you can upload your resume on various recruitment website and you will start getting calls if you meet any company's requirement.