/diy/ - Do It Yourself

OK, since there's no appropriate thread I'll ask here:

My grandmother, rest her soul, used to make everyone comfy wool socks every year as presents (similar to pic but thicker, spaceier and not made by 12 year old kids in Bengladesh). She would use 2 needles and thick wool.

I want to learn how to make them but I have no one left to ask. I don't even know the English term for the skill or occupation so I can't look up examples, patterns or materials. Where do I start? (I still have 1-2 pairs in bad shape so I could try to mimic her style in time.)