Its really easy to fuck up the shape of your dick.
I’m terribly vain and so things like shape are important to me. I fucked up on the turkey neck until I adopted a skind stretch routine (and some great care) that’s impossible to fix. I also managed to change the shape of my glans when I was testing out hanging, effectively using the hanger as an extreme ULI device without intention. That I never fixed but I probably could if I’d carried on, they are much more snub nosed now. The thing I did fix was the general shape but it only varied slightly.
>Will the shape expand outward ,or will my middle become thicker than the base?<
All this depend on your programme. Remember that hanging and long hold stretches will increase the base girth. Thats fine you can ULI the girth further up to correct. Jelqing with too low an erection with create a baseball bat shaped dick and thats going to be more annoying to fix.