u/Comfortable-Unit-521

I'm an econ student with little to no background in CS/coding. Recently I've been self-learning R for research roles. I want to build a sort of portfolio where I can showcase my work and the skills I have. It's more so that I can prove I can work with the data since I have no formal training in it. I have some questions regarding that:

1. I heard github is a good place to build a portfolio? So should I build my portfolios in github or would it be an overkill since I'm not in the CS field?

2. What are alternative ways to showcase my work?

Thank you!!