Hello Shivansh, it will be more effective if u can ask specific questions about where or what help/guidance you required for the project you are interested in. This way more people including mentors and your fellow candidates can help you faster.
I see you are the newcomer here so Please sign the contributor's agreement before making contributions to the Plone core codebase (if you haven't). To get-started you can go through this discussion post: Recommendations for GSoC aspirants .
Thanks!