GSOC 21: Where to start with mobile/responsive design implementation

Hello everyone,
I’m Swapnil, a student of Jadavpur University, Kolkata. I would like to work on implementing mobile/responsive design views that have not been touched upon already.

I understand that a lot of progress has been made on this during past GSOC projects, and I was wondering how best to keep up the good work. I’ve gone through the designs provided, and would really appreciate some help about how to go about implementing them.

Thank you