What is the best AI tool to “fatify” a photo?

So, I’m very curious to see what I’d look like if I was 300lbs (I’m currently about an average weight for my height). I don’t have a whole lot of photo editing skills, so I’m hoping AI can help me out lol. I tried using ChatGPT but that always messed it up and doesn’t usually look very realistic, but there also seems to be a hundred other AI apps out there. So I’m hoping that someone in this community has some experience with this stuff and can recommend something.