u/Remarkable-Note-3126

I'm trying to remake this bag I found on Pinterest, I can't find a patter or anything for it, not even a source so I'm just making my own pattern. The only problem is that I have absolutely no idea on how to join these granny squares together 🥲 I looked up online but I can find a tutorial for every situation expect this one

Can anyone help me figure it out? 💓🥹