hello aspirant,
well there are infinite number of career options and courses after your 12th.
some of the courses you can go after 12th they are:
1) B.sc bio technology,
2) bachelor of technology,engineering
3) b.com
4) bachelor of arts
5)bachelor of arts, political science
6)  B.sc mathematics,biology, chemistry.
7)bachelor of business administration(BBA)
8) bachelor of medicine
9) bachelor of physiotherapy.
plenty number of courses are available after 12th, you can choose the right path depending up on your interest.
as of current generation , Engineering is the most preferred option after 12th since there are higher career options and job prospects and high scope.
hope you understand,
thank you