Hello Kaushik,
Thanks for reaching us, I hope you have already gone through [1]. Find some tasks over the phabricator which fascinates you and get assigned to the tasks and start working on it. Here is a good way to search for easy tasks [2] or look for little annoying bugs over here [3]
Let us know if you've got any other queries. If so reach us on IRC Freenode network channel #wikimedia-dev
Happy Coding !!
[1] https://www.mediawiki.org/wiki/How_to_become_a_MediaWiki_hacker [2] https://phabricator.wikimedia.org/maniphest/query/jsySdXllltwv/#R [3] https://www.mediawiki.org/wiki/How_to_become_a_MediaWiki_hacker
Regards
Gopa Vasanth Amrita Vishwa Vidyapeetham http://www.amrita.edu/ || Blog https://gopavasanth.wordpress.com/ amFOSS https://amfoss.in/accounts/101/ || GitHub https://github.com/gopavasanth || Gerrit https://gerrit.wikimedia.org/r/#/q/gopavasanth
“Yesterday is not ours to recover, but tomorrow is ours to win or lose.”