That looks as if you added a SubD modifier. That model is not made for subdivisions though, so it can go super crazy if you add one. But it also looks as if you rendered in orthographic instead of perspective? Anyways, there is a lot going on there, for sure you are in do-over territory. Good news is, when we’re starting to learn Blender, we all have to do and redo models 2 and even 3 times, it’s the repetition that helps so much, each iteration gets better and better and you start to see where you made mistakes and you gain speed. We always recommend people to start over, you wont regret it.
