How Can We Create an Effective Buddy System to Help New Joiners Feel at Home?

I would like to know how an effective Buddy system can be implemented in an organization. Any suggestions are welcome; this is required for my summer project. I am required to propose an effective system that will make the new joiners comfortable with the organization.

I've already read that and a few more articles. The link mentioned above provides very limited information on the topic. Since I am doing a project on it, I would require more detailed information—like how a buddy is assigned and what the responsibilities of the buddy are after the person joins the organization, etc.

This post is basically for more inputs/ideas that I could use for my project apart from the ideas I have already thought of.

Regards,
Aditi