Update #1
I have finally understood most of the controls and features that OnShape offers, and I have gotten pretty far in my project to replicate my PC in CAD. It is very similar to SolidWorks which I am familiar with but was not expecting and it has made this project go by a lot quicker than I had originally anticipated….

I still have to add the hardest part to my model, the aio tubes, then I can work on the case and recoloring the model to look like my PC!