How do you make a mobile AI Generator?

I’m Trying to build a AI Program for mobile that designs a guitar(Image)based on the text input(Mainly Neck,color,shape,and style)But I can’t figure out how to use ai from only Unity services I’m thinking a GAN type AI for the systems but I have no idea how to do that and I don’t know how to use unity to preprocess data but I’ve collected all the data I need