hii Raj

its good to know that you are interested in Digital marketing , i can suggest you 3 ways

1st one is start the company with services like web devlopment , digital marketing and graphic design as it has huge demand before you make company do digital marketing short term course and gain knowledge 

2nd is do the MBA in digital marketing huge recuiters are waiting for DIGI marketers graduates as well

3rd complete short time digital marketing course and try for interview but this is quite though 

hope this helps