If you can afford the donations then I think you may. Although most private colleges also demand for a minimum of 65% aggregate in PCM.
Let's hope for the best.

Respected sir,
As considering your marks you will not get admission in any NIT or IIT but not to get worried sir there are amny private colleges where you can get admission.
I can suggest you only one thing to forget about what the past is and to take care of your future and to overcome the past so that nobody question about how to got less marks in hsc.
Thank you

See on the basis of marks which you shared you cannot get any of IIT Or NITs
But there are many college which have their own entrance exams such as VITEEE , MUOET etc
And also many colleges have direct admission system for  different branches in btech.
So you can try them.
Also if you want to give a try you can sit for the improvement exams.
All the best..!