As a beginner, can someone help me with a pattern for this one?

I added 5 photos for each side.

I know this one seems to have been knitted but I wanna make a sibling for it and I can only crochet. The legs aren't the problem but this triangular body with the triangle bottom and seemingly only one sewing line. Does it mean that the main body is a big square that is folded and then sewed together?