When I try to download Lightroom theres no option as to where to download it and it goes straight to my C drive. I have very little space on my C drive so I can't but many pictures on it, is there a way to move my lightroom to my D drive?
You can, once it's downloaded, install it to D, but you'll get nowhere with Creative Cloud unless you have many tens of GB free on your C drive. Computers sold with tiny SSDs just aren't up to this.
Sure, your pictures will need enormously more space than the app. Make sure you have at least 30 GB free before you start anything.
Yes, Lightroom or any other program.
If you installed it using the creative cloud client, can't you go to preferences then syncing, and choose the drive you want to install it?