From a separate, uncompromised device, change the passwords to your primary email, banking portals, and password managers. How to Download Safely on macOS
Uninstall any software downloaded from this site immediately. Run a full scan with Malwarebytes. Then, either pay for the software or use open-source alternatives. One identity theft session costs far more than a Final Cut Pro license. torrentmacnet is it safe work
Run suspicious apps in a VM (like Parallels or VMware) to keep them separate from your main system. From a separate, uncompromised device, change the passwords