Would wearing glasses or contacts make it better/the same or worse?
No, there are many myths about the links between the wearing of glasses and the progression of sight. Wearing glasses/contacts would just make you see clear. If you don’t wear them as required, then yes because you’ll make your eyes work harder than they need to, straining them. This also applies to squinting, reading in the dark and all the other factors you’ve mentioned. It is important to note that for eyes to go worse, the factors are not limited to the above.