Hey, that's really cool that you got to try acting and enjoyed it! It is definitely amazing to explore different parts of yourself through character work :)
I'm just wondering, what made the old woman into a monster? The fact that she was "mad"? Having hallucinations is a really human thing that many both elderly and young people experience. Most people would experience some type of "insanity" if they are under enough stress. I don't think having hallucinations turns you into a monster. And that's probably not what you meant, but I'm just curious as to why you chose that word? :)