You can easily learn digital marketing by enrolling in courses from different institutes. If you don't want to invest money at a initial level, then you should look on youtube. There are numerous video on digital marketing which is sufficient enough to build your basics.

You can also check SWAYAM website. Two courses on Digital Marketing is coming up by Punjab University. You can follow them for free. SWAYAM is another name of NPTEL(if you are not familiar with it). One course is starting from tommorow & another from 2021.

You can also earn certificate my giving exams at the website after the course. To know more register in SWAYAM. Its a government of India initiative. So you can trust the curiculumn.

Have a great day!

Hello,

There are many online courses available for Digital marketing on sites like Coursera, Udemy, Edx, google garage etc. Some courses are free while most of them charge for certificate. Google garage has free digital marketing course ans you can get free certificate too. You can check tha site if you want and yes digital marketing has become a popular courses now a days owning to its importance and hence many sites are available online which provide you this course in many different ways. So do check out sites which i have mentioned and select one. All the best to you.

https://www.careers360.com/courses/digital-marketing-course