Filling in a sloped portion of backyard

Always remove instead of adding. You can’t really just put dirt on a slope to level it. You have to compact it at a minimum and if the material isn’t great you have to cut a key way. otherwise the first time it rains your pool will be at the bottom if the hill.

rent a John Deere with a blade and bucket attachments. Or for about $400 you can rent a backhoe from sunbelt or whatever your local equipment rental outfit is. You don’t need a license or any training and if you don’t have a hitch big enough they will bring it to you for additional $ - depending on how far you are away.

Driving a backhoe a messing around in the dirt is crazy fun too.