MBA Preparation

Yes, MBA is a good choice, but it will be very valuable if you get some work experience before taking MBA course. You can go for specialization which you are interested in. Finance do have maths involved and engineers find it easy to cope up and excel. Operations will be more valuable if you get a chance to work with manufacturing or production companies.

As per eligibility guidelines for pursuing MBA one needs to be a graduate or in absence of graduation have a professional qualification like CA/CS/ICWA. So, if your case you can seek admission based on your professional qualification as a CA.

You can prepare for management exams like CAT, XAT, CMAT and SNAP. I would suggest you to go for Arun Sharma's books for DI LR QA and VA. They will be available in major bookstores and online on e-commerce websites.

MBA in finance is certainly a good option for B.Com qualified. CA, CWA or CS can be pursued along with or post B.Com ACCA, CIMA etc. are international certifications. Computerized financing courses such as Tally and Peach are also useful.

The earlier you start your preparations, the better and more continuous your academics will be.

Hi,
If the topic is from current scenario like demonetization, Trump vs Obama or Modi Government then do include some data facts / facts and figures. If the topics are like 'I am honest', 'Respect yourself and others will respect you' then you can link any instances of real life you experienced or read somewhere and the learning / inference from the same. Try to maintain a flow of the writing intro., main theme and conclusion. If you know any good quotes then you can use it for your conclusion or introduction.

It's famous for marketing. If you want to go for marketing, go for it.
If you are looking for finance as major or other specialisation like operations, financial engineering, HR, etc. colleges like IFMR and GLIM are also good choices.