Advise a clueless newbie

Hi I'm 18F currently doing my Bsc in Biotech from a private tier 2 college. Now doing more research I got to know that Biotech doesn't really have a job market (I don't want to do research)and frankly speaking I'm from a middle class family so making money is obviously a thing I have to keep in mind. I'm thinking of pursuing MBA after my bachelor's not just cause of the money factor but also I have gained interest in management so can anyone advise me on the different positions which I can apply for after an MBA and basically teach me the basics and also how to prep for CAT. I still have 3 years to officially give the exam but I want to prep ahead as my math isn't strong. I'm a PCB student with 94.6% in 10th and 87% in 12th.