Hi Priyanshu,
I'm a fellow GSoC aspirer. What helped me a lot is checking out the contributing guide posted on the Django website.
Here is the link:
https://docs.djangoproject.com/en/dev/internals/contributing/It'll make things a lot easier for you if you've never used Git before and never tracked tickets in an open-source environment.
You should also try to start contributing as soon as possible to get a feel for Django's internal codebase.
If you have any other questions, don't hesitate to ask on here. Everyone here replies promptly.
In the future, try to search for your question before posting a new thread because this question was asked in three different threads before I believe.