There are various Checkpoints, but you cannot save manually in the manor.
Your post made me laugh,as well as bringing back memories.
I spent ages in the manor trying to work out how to actually start the game.
As far as i recall,i think there is an option in the start menu to start the game rather than enter the manor)which is training level) first.
Windows 10 Home vs Windows 10 Pro comparison: Here are the extra features you get in the Pro version