Both the statements mentioned in your question is bit contrary. I mean you will have to work hard to get into good college and therefore a good placements and all.

Just in case you take admission in any college directly without knowing anything about 11th and 12th then you can face some problems in your semester exams of Mathematics and Physics.

I am trying to discourage you but still just think of it.

Well i can mention few colleges in Orrisa where you can take direct admission or you need just a double digit marks in JEE mains.

GIET Gunupur.
OEC Bhubaneshwar
CEB Bhuv.

All the best!!