That fabric will be OK but you will have animal faces cut at odd angles if you don't mind that ...
As for sewing it together, I did the same thing to make a design wall but at that time I didn't have one and simply laid it out on the floor and picked them up as I went along. I actually sewed them together two rows at a time in triangles. (3 pieces on the bottom and one on top and then sewed the 4 piece triangles together) Does that make sense? 2 rows at a time horizontally. You can't make hexagons is my point.
I'd better stop typing before I confuse myself more! :wink: