Your question isn’t clear
And I answer it in general way. .Thing is you should compulsory write the cet or comdek exam to get a seat in engineering course and if you want to go by management quota then you can write comdek and query about the management fee from the college:)
And the difficulty is concerned don’t worry about it ,concentrate on your studies you still got a lot of time to prepare for:)
Hope it helps:)
For further doubts comment me.