Hi Aviral!
I am happy to answer any SwiftPM related question you have. We have a few SwiftPM proposal ideas on the "Project Ideas" page. You can also submit a proposal with your own idea!
A good way to start would be to familiarize yourself with SwiftPM. We have a beginner guide here and a detailed guide here. There is also more documentation in the SwiftPM repository. If you would like to explore the code, we have some starter bugs in Swift's bug tracker.