Most universities offer Office 365 Education for free, which includes the full desktop apps (Word, Excel, PowerPoint, Outlook, OneNote). You just need a valid .edu email address.
Since the Office 2019 version is pre-activated, you don't need to enter a product key or go through the activation process manually. However, to verify that Office is activated, follow these steps: download pre activated microsoft office 2019
For individuals: rarely prosecuted, but your ISP may send warnings, and if you’re in a country with aggressive anti-piracy laws (Germany, France, Japan), you could receive a fine. Businesses face audits and steep penalties. Most universities offer Office 365 Education for free,