Need serious advice...

I'm a student of 12th .. just gave my boards and I want to do BSC and join merchant Navy..

ik the basics and everything about merchant Navy.. I've been thinking about it for 1.5yrs now ..

but I'm really confused now. as my boards did not go well.. so I'm not expecting to clear the percentage criteria... but I've filled the nios form. for oct public exam..

so now I want advice... what should I do now ?????.

I want to join soon too.. not finish my collage and sit.. so I need to go for sponsorship too ig.

so can I go for sponsorships after IMU CET ??..

what are some good colleges???..

and should I take a drop yr. and prep for next yr..?

or is anything possible this year??