You can once again give the entrance exams again and aim for top colleges if you so desire. Leave either Maths or biology that you don't really like and take a hold of chosen 3 subjects, excel well in them and get in some top Medical or engineering colleges. 

Dear candidate,

You can take up diploma or do distance learning. you can take up visual effects or learn a programming language. there are n number of courses. just select a field of study you want to have a career in and then things will start falling in place.i hope this solves your query.check out the link given below which has information which may be helpful to you

Https://www.examsplanner.in/top-courses-after-12th/