Hi Vishal,

As you would be familiar with all the mathematical theory and its application, it would be good for you to go for digital marketing courses. The domain is vast and requires analytical skills as well. Your mathematical background will surely benefits you if you want to make future in this domain. Marketing is not only about creating visibility of the brand by putting up advertisements. It's about analysing the customer segment, creating charts, algorithms for which a person needs to have an intricate mathematical knowledge. Also Digital Marketing course encompass a major topic which is Search Engine Optimization (SEO). SEO is all about increasing quality and quantity of traffic through organic search result. As you can see that it's technical rather than just a mere medium of advertisement. So in my opinion you should go for digital marketing course. This course is available online and you've to complete a project in order to get the certificate. You can refer to Simplilearn and Internshala for further information regarding the course.

Hope this will help you!