Long time ago, I once added brake fluid to my power steering in my car. The power steering seals failed. Ended up changing the whole system
. NOT CHEAP!!!
Flush your system as soon as you can. Refill it with either transmission fluid OR hydraulic fluid (since you're starting from scratch, double check the LCI app manuals). Made sure you add the anti-sticktion fluid. Download the LCI app. It has all that info and manuals, troubleshooting instructions, bulletins etc. very useful!!