Installing software has messed up my computer

Trying to install all the requirements from here https://www.aaonline.io/alpha-curriculum/3.0/environment-setup
has resulted in all sorts of problems for my Mac. I have tried contacting Apple support and their only suggestion was to wipe everything.

I am falling behind in the prep work now and really need help with this.

Sent you a DM, please answer at your earliest convenience.