Welcome! Glad to hear your interest in contributing to Wikimedia projects. I would encourage you to go through the Wikimedia New Developers guide that will give you an overview of many different areas & projects that you can get involved in: https://www.mediawiki.org/wiki/New_Developers
If you are a university student, you can also apply to one of our mentoring programs, Google Summer of Code or Outreachy (make sure to check the eligibility criteria first):
* https://www.mediawiki.org/wiki/Google_Summer_of_Code/2020 * https://www.mediawiki.org/wiki/Outreachy/Round_20
If you want to learn more about the mentoring programs, come chat with us on Zulip: https://wikimedia.zulipchat.com/#narrow/stream/220258-gsoc20-outreachy20
If you need anything else, see feedback, questions, and support: https://www.mediawiki.org/wiki/How_to_become_a_MediaWiki_hacker#Feedback,_qu...
Happy contributing! :-)
Cheers,
Zoran Dori volunteer, Wikimedia Serbia s: zoranzoki21.github.io e: zorandori4444@gmail.com