Bug Can't get Unity to work, seems to be an issue rooted in not being installed in my C: drive?

Hi, something super weird is happening as I try to use Unity. It seems to continually be attempting to download files and search for them in my C drive, which is full; and I've specifically directed all downloads/ installation to the D: drive which has 700 GB. I have one of those setups where I have a smaller 100 GB SSD for my C drive with my MS OS and a few core applications and a 1TB HD for everything else on D. I've directed all paths to my D drive which is 1 TB. I can't get Visual Studio Community 2019 to install from Unity Hub I believe because of this issue.

I've set all the preferences in Unity Hub to direct to my D:Unity Folder, and Unity Hub is installed on my D drive.

I installed Visual Studio directly from the specific installer for that application in D drive. I was then attempting to troubleshoot this issue by opening a new project in Unity then designating the preferences to use Visual Studio. But when I attempt to create my first project, I again get an error where I can't even open my first project. The first time I tried, it said it can't find a file located on my C drive. It appears that it's trying to find Unity files in C:\Users\MyUserNameHere\AppData\Local\Unity\cache\packages\packages.unity.com... and several lines more. Then, when I tried again, it says I'm using the wrong version of unity, even though I only one one edition.

At this point I'm thinking Unity is probably more trouble than it's worth as I haven't been able to get the engine to run for a few days now and it feels like it's going to be a headache to use moving forward. I've tried fresh installs etc. I can't get to the point where I can use some of the workarounds people have suggested and am wondering if someone has figured out how to make this software work when they had to install it on a drive other than C:

I've uninstalled Unity Editor with all modules, and uninstalled Unity Hub. If there's an indepth guide to installing this software outside of C: drive I'd like to give it one last try before giving Unreal or Gamemaker Studio2 a try.