I have this project that I have to do and my teacher wants us to do this in xcell or whatever the green one on office 365 is called anyway I have to turn this in on thursday and I have no idea where t

I have this project that I have to do and my teacher wants us to do this in xcell or whatever the green one on office 365 is called anyway I have to turn this in on thursday and I have no idea where to start my teacher said it’s worth 500 points and it will take us down three letter grades I cannot afford for that to happen so please help me out or tell me where to at least start