I'm doing this challenge on Hacker Rank that wants me to implement a linked list.

It seems to want me to find the last-added instance of node and change its head to link to my new instance of node. Therefore the last instance added would have head=Null (I'm using Python).

This is the pic they provide -

Wouldn't it make more sense to create a node instance with its head linked to the previous node? That way the only node with head=Null would be the first node created.

I've seen conflicting suggestions so far. I'm not a CS student or developer.

EDIT -

This example from Youtube (1.36) suggests the second method.