So I'm somehow not installing Minecraft Java on my PC

So when I try to get java with the new installer after I had bought it off amazon with a digital code, it doesn't install java with it, (even after multiple tries) and only gives me the game demo when I download it. Is there any way to fix this? Environment will give more info.
edit: I don't wanna record myself so I don't show any personal info. Just an FYI.